for wheels, you can check your local performance/tuning shops.
you can also check various sites like discounttiresdirect.com or wheelsnext.com
for suspension, search GEN6 Suspension thread. all the answers will be there.
for fitment, search WHEEL OFFSET AND TIRE CALCULATOR
yes it would look silly to put a Lexus emblem.
for bodykits:
1. Import Trenz Naristo Body kit.
- look up EPSILON. he is a member here who has that kit and in White as well. best gen6

-
www.itz-usa.com
2. rksport lip kit.
- several members have that kit in here (sorry, i cant remember all names

)
-www.rksport.com
3. razzi lip kit
- similar to OEM se style
- look up Trojan. he has that kit. (another good looking gen6, IN WHITE AGAIN)
-
www.razzi.com
4. Carson Toyota SET kit
- toyota SET kit
- look up BENCA1, he sports that kit. his car is also white
-
http://www.newtoyotaparts.com/product/?id=2789