This is her car

I'm running 15x8.5 -6 Work Cr-01's with 205/50/15 kumho ku36 on them.
This is my piece of crap

In terms of handling, mine seems rock solid. The steering doesn't feel heavy at all and I use a 330mm Nardi which should increase the steering load (feel I should say). Our wheels are roughly the same track width but the ku36 balloon a lot more than your average 205 (hence the flares) and I don't run a lot of camber either. It all depends on how you want to set your car up and what you want to do with it.
In terms of wheel sizes, you will find a lot more cheap 14" than 15"s but you limit yourself a lot with tyres and when you get to wider sizes, you will have to either stretch or run an R-spec which is a little overkill for street. I think the widest 14" decent street tyre I've seen is a 195/55/14 Toyo I think? Otherwise you'll mainly be looking at 185/60/14 Adrenalines. If you go 15", you have lot more choices. I will say that 195/45/15 over an 8" is a pretty mild stretch but I'd recommend not stretching unless you have to as you stiffen the sidewalls up and reduce the flex.
Sorry if this is a little vague. I'm on my break at work over nightshift and my brain is a little scattered right now. Most wheels you will find like Equips on YAJ (yahoo auctions japan) to import, will be 14x6.5 +15 or so. Which is pretty decent and you shouldn't have trouble with tyres. It's the low offset 8" and negative offset wheels you should try to avoid unless you want to do some guard work.