Hey bud, welcome to the world of sim racing.
Probbably the most expensive hobby you will ever encounter!
For PC wheel options there is only one choice really...the T500RS. I have owned the G27 also but much prefer the 500. People have their own preference and if you can demo either then I would to get a feel for them.
PC also opens up a whole world of options regarding add ons such as telemetry displays and of course triple monitors.
Regarding cockpits I am a little bias towards the rigs we build and if you want a custom rig then aluminium profile is the way to go because it is so easy to change and adapt. We have a demo listed on our website
www.kbaluminiumprofile.co.uk
We can custom build anything you want and also offer stand alone screen mount frames.
I double up my rig as my office so the screens can be folded in or out as required. When I changed to triples it was the biggest step I have taken for immersion in a long while and something I certainly wish I had done sooner.
Next question is do you want to add motion? If you do then profile obviously offers more advantages. Motion is my next step and I mention it now because of my own experience and what I have seen others do....
Some people start with a DFGT wheel and upgrade to a G27 then to a 500. At the start they um and ahh over jumping in with a 500 to start with and end up spending more in the long run rather than bite the bullet and trust the judgement of those on GTP. Same goes for rigs, motion etc
Lots of options are available to you so let us all know exactly what you want, budget, space, game titles you are interested in etc