The ride quality discussion has been done to death
but I'll repeat myself for the sake of it
. If you upgrade the suspension, you'll improve the comfort overall. Eibach springs with KONI Sport dampers greatly improved mine, such that 19s + suspension upgrades felt much more comfortable than 17s with standard suspension! High quality (lighter weight) wheels helps, so avoid the cheap stuff if you can afford it.
There are plenty of on line rolling radius calculators, which I've not checked, but I would have suggested that 235/30/19 or 225/35/19 as being the right tyre size? Might explain why shiny's tyres are rubbing against the arch liners. - They do this as standard anyway!
Yes, I had 225/35R19 Toyo Proxes4 to begin with. No rub at all, including the rear. Great stance, great handling. ONLY issue I had was the relatively low 88 load index, which was too low for my V6. So I didn't want to do that again.
After the Toyo's wore out, I changed to 235/35R19 Continental Contisportcontact3 (have had high-end Conti's on other cars and love them). Only since, have I had rubbing at the rear, and the wide rubber doesn't have the same 'stretched look' as 225's.
If you have a 1.9 or 2.0 GT, then the load index might be lower than the '91' on my 3.2. In which case, you could use 225's if you only need at least '88'.
Almost identical set up then. Did you see the pics that i posted? Are you able to take a look at your car and see how much clearance yo have?
would really help
If I have chance, I'll try and check it out when I next have the trolley jack out.
Car with 225's: http://pic20.picturetrail.com/VOL97/.../377216800.jpg