[schade]

you do have pretty much infinite possiblities .... the rim size your after is 16x7 or 17"x7 with a 4x108 bolt pattern and usually around a 42 offset

... and as for tire size you can run anything you'd like, the only problem you run into when you get away from stock tire size (ie. 205/50/16 or 205/45/17) is that your speedometer well be off alittle (+/- 5kph) and you'll raise/lower the vehicle the further from stock you get

tire size's i've fun and had no problem with are .. 205/50/16, 205/55/16, 215/50,45,40/17

so if that tire shop tells you it won't fit, then i'd go to another shop or tell them to order them and you'll deal with that