When you run a bigger tire, you have a bigger diameter and so you're speedo will be off. I've had a bigger tire for like....a year now and I'm kicking butt at autoX events.
I would try for a 225/50, since it is almost perfect for tire size. PLus they are cheaper, more options, weigh less.....
Asking if they will fit depends on your offset and your suspension\.
I'm pretty sure you have shocks and struts right? if so then get either 0 offset or slightly negative and it will fit fine.