Wise man, it took me a while to learn how best to spend credits... And I still wilfully ignore what I've learned and buy cars I can't even use. But you're right, as long as you have something you can use on an oval.
That's one thing I don't like about SRW though, I kind of feel like whenever I play it I should be doing something to earn credits, and even then I want to do something to earn credits with the least amount of effort or time. Then I buy cars and only use them if I can use them on ovals! They need, in my opinion, to adjust the payout so everything is worthwhile. Say, for example, basing credit rewards per lap on a par time or something. If it takes a minute and a half to do one lap then it should be worth three times as much as a 30 second lap.
Also I think they should get in there early and totally rip off Battlelog. It would set SRW apart from iRacing (not that I know how iRacing actually works) and could really draw people in, they could even add achievements, unlocks (all I can actually think of is cars and liveries) and rented servers and stuff... It could work, surely?
Anyway, whatever, I'm just daydreaming. Thanks for those brief reviews, Bazz, I think I'll buy the Modified now, the Cossie after that then get back to the Mazdas. I recall saying I was going to buy the three of them before anything else a little while back. I still 'need' the R5 Turbo as well. Looking at my account history I've actually spent a fair bit on SRW, $50 since May last year. I've bought 24 cars with real money so far (well, the McLaren M23 I managed to get for free), probably only unlocked maybe five or six with credits.