Rear tire width question

295/45/18 should be fine. Some guys are running 305/45/18 on the rear with a drop, that's what I'm going to do when the Toyo's are done.

I guess you should make sure you have the proper backspacing as well though.
 
depending on your drop (how low you are already) you may need a panhand bar and make sure the offset is for your year car.. I have 99-04 saleens with a 2" drop and im running 285/45/18 in the rear with a panhand bar
 
While I haven't ordered rims from AM myself, I've read ALOT of bad things about their rims and have experienced their lack of customer service firsthand. Good Luck.

The 295 should be fine. I'm running 285's and have alot of room around them.