You can do things to fudge this (anything is possible with enough time and money, don't ya know), but the safest bet in my personal experience is this:
17x7 - Front with 225 (or narrower, I went 215 just to be safe) 45/17
17x8 - Rear with 255 (again, might be safer to go with 245) 45/17
Edit: if memory serves, that's on a wheel with 4.5in backspace, but probably best to have someone else weigh in and confirm/deny that fuzzy memory.
Your suspension setup may allow for more or be tighter than others. It's an exact science with a dash of voodoo.
I'm not an expert, but I play one on the internet.