Well, Im not sure what are all the details for your car since I dont know much about 626s. White wheels always look pretty nice on a Green car, or gunmetal if you like that.
As for rims. Just check around and see if you can find a kind that you like. They are all over the internet.
www.tirerack.com has a program that lets you see what it will look like on your car. I would think they have 626s on there.
If you get 17s 215/40 or 45s/17 would probably work pretty good. What size are your stock tires?