How good of a deal is this?
 

I just got a brand new '06 Chrysler 300 base for $20,891 (not incl tax/tag/dealer fee). It doesn't have much options except for the Sirius Sattelite Radio and the adjustable pedals, but it still seems like a great deal. Can anyone concur? What is the going rate for this car?

Also, I would like to replace the hideous plastic wheels that came standard. I really love the rims that come on the 300c, but I believe those are bigger tires, right? Any thoughts?

Thanks!
Richard