Welcome first of all...
Well, where are you planning on buying the rims and tires? If you're near some shops, I suggest finding out what they carry, or what they can get. It's typically cheaper than ordering say from tirerack.com. You should check out their site as you can pull up your car and test out the rims on there...like you can see some 5 spoke designs on there on your ride.
It also depends on your budget. I couldn't say stay away from the cheap brands as I've used them without any problems, but sometimes they have more trouble balancing than the higher end brands. For instance, a decent brand but not crazy expensive would be something like Enkei. Cheap ones are like BSA, Ikon, ALT, ADR (but very popular and large selection), and the list goes on and on.
For tires, it also depends on your budget. I personally like Toyo's, something like the TPTs might be good for her. You probably want a Performance All-Season tire, something that handles better than a regular all season, yet still maintains a decent tread life. I've heard good things about the cheaper Hankook Ventus HRII H405's.
My suggestion is to first search on some rims and tires that you want, and then post them on here. That's much easier to judge for the members here, than to rule out brands.
Here's a site to check out:
http://www.1010tires.com/wheels.asp
Here's one from Enkei, RS5's.