People buy tires for different reasons...
1. whatever fits their budget
2. they look nice... (tread pattern)
3. they handle well
or a combination of those...
Your stock rim... 205/60 R 16 (16 inch rim that is 6 inches wide)
205 is how wide the tire is from front to back (outer rim face, to inner)
60 is the aspect of how tall the tire is from the rim and is X percent of how wide the tire is... in this case, 60
R16 is the rim size... 16 for 16, 18 for 18, etc
Another example, most people get 18x7.5 or 18x8 here...
The recommended tire size for those rims are 225 (best suited for 8 inch wide rims) 40 (40% of 225, a low profile tire) R 18 (18 inch rim)
For practicallity, an 18 inch rim is great on a Solara. If you're willing to put up w/ a rough ride and doding potholes... then you can go up to 19" rims. Most people that go below 18 usually regret not getting 18+ size rims.
As for tires... they range from having a nice ride quality and being quiet to riding like crap and being ridiculously noisy. I've been through 3 sets of tires on the Solara...
OEM Bridgestone Potenza RE92 (about $140 per tire)- Quiet, nice ride but handled like ass and it wore fast as hell.
Kumho Ecsta 711 (about $70 per tire)- Loud... ok ride for the price and handled well for the price. Got around 15-20K out of the 2 front tires (no rotation) before they were legally bald (2/32)
Pirelli PZero Nero MS (about $190 per tire)- Quite (almost as quiet as the Potenza), awesome ride and handling like no other and it has a higher tread rating than the other 2 (Potenza 140, Ecsta 711 320, Pirelli 400)
You do get what you pay for...
Research tires (reviews are the only helpful thing...) on
www.TireRack.com
www.1010Tires.com