If you want a BMW, you'll buy a BMW. If you want a luxury Toyota or Nissan, perhaps you'll go for one of the other two. The competition between those manufacturers is something perceived by the marketing departments of Infiniti and Lexus. The only real competition BMW faces is from the similarly priced cars of Mercedes and Audi.
I do agree with this, though even as a BMW owner myself, I'm not a brand snob.
I can't speak to the current generations of these cars, but a couple years ago I was shopping among used varieties of the first three cars
Gil mentioned. I ended up with a BMW 325i ZSP. Here's how it broke down for me, in this order:
Lexus IS300 (or IS250 or whatever it is - the Altezza one): Nice enough car. Decent styling, decent handling, decent power, interior nice but somewhat... odd, and not large. The interior styling was a weird mix of throwbacks (the binnacle) and ultra mod (the center stack). Not overly quick, but good enough for a DD. I started here because I assumed it would be a relative bargain, but asking prices seemed a bit high. More on this later.
Infiniti G35: Also a nice enough car. Better styling than the Lexus (and even more so in the current generation). Interior better than the Lexus, too - much roomier and with less oddness to the aesthetics, which increases functionality. Power was better, handling a little worse. Asking prices more in line with my expectations. Ultimately, I decided the G35 was exactly like a room from an Expedia "4 star" hotel: it was modern, it was luxurious enough, it was functional, it was reasonably priced. It was also very bland and didn't feel like "home". It also seemed somehow dated, even though it was only a couple years old.
Every car review of any midsize sedan with any sporting pretentions at all invariably compares it to the BMW 3, so I figured I might as well go to the source and see what the fuss is about. Up until now I had assumed that I would pay extra for the badge, so I hadn't bothered looking.
BMW 325i: Bingo.
The best styling of all three cars (E46, but I also think the E90 is the best of the current generations, even though I don't like it as much). The interior is simple, but uses nice materials, and is exquisitely functional. The design is classic without looking too dated. Power is a little better than the Lexus, a little worse than the Infiniti, and is adequate. The extra horses - a fair number of extra horses - in the G35 just didn't shine through the overall
meh-ness of the car enough to grab my attention. But as I've said here before, and which Doug will tut-tut, it was the actual
driving that made this car feel like a favorite chair or pair of jeans. You really just have to feel it to understand. It's not a supercar, but it makes every enthusiast driver feel like a brain surgeon. You can place it on the road
exactly where you want it; it tells you
exactly what's going on, and it answers you.
And it was the same price as the G35, and much cheaper than the IS300! Why buy a copy when you can have the original?
Gotta go right now, but more later.
[edit] OK, I'm back.
Yes, there are a million of 3-series on the road. There are a million G35s on the road, too. And "exclusivity" is a stupid value anyway. OK, I see five 3-series on the road to every one IS300. So what?
That doesn't make the IS300 a better car. Why choose NOT to drive something good just because lots of people have already made the same choice? Most of the E46 3-series I see are base 325is or, for the more well-off, 330xis, all with automatic transmission. I've got a 325i ZSP sport package and a 5-speed. That's got all the important bits (to me) and none of the fluff. Would I have bought a 330i ZSP or ZHP? Hells yeah. I couldn't find the former and couldn't afford the latter.
On the subject of the newer cars, I'd have to drive them and see. I suspect that yes, I'd pay a premium for the BMW.
Frankly, I dislike the the new IS350's styling quite a bit. It would have to be a stellar car to get me to buy one.
The new G35 looks very similar in design and philosophy to the old one, and I suspect I would react the same way. It had plenty of power before and adding more isn't going to make it any more exciting.
I'm not as enthused about the E90 3-series (the sedan) but the E92 coupe is gorgeous. I'm stuck with a need for four doors, but the E90 is better than the IS350 and no worse than the new G. The 335i is written to be a marvel to drive - I'd have to experience that first hand and decide for myself, but based on my BMW experience, I've no reason to doubt it.
I keep my cars a looong time, so depreciation doesn't bother me much. I'd be more likely to buy a 2-year-old off-lease 335i and let the previous renter pay for the depreciation, anyway.