I'm guessing you haven't read up on the Bentley Continental Supersport? In case you haven't:
Cost: $275k est. (compared to the LFA $350k)
Twin Turbo 6.0L, W12 engine, AWD (LFA = 4.8L, V10, RWD)
620 bhp (LFA 552hp)
590 ft-lbs (LFA 354 ft-lbs)
0-60 in 3.7 seconds (LFA does it in 4.2 or 3.6....not sure)
top speed 204 mph (LFA top speed 202)
Carbon Fiber bucket seats to go along with the typical Bentley interior (which IMO is the epitome of "refined")
Now that sir, is a supercar!
Edit: had to remove my MPG claimed because I lost my reference.
Oh, and for the GTR vs. LFA argument, check out this link (which claims the LFA does 0-60 in 3.6?):
http://www.autorivals.net/supercars/2011lfavs2010gtr/2011lfavs2010gtr.htm
My point is, while I like the LFA, the stats don't justify the price. As the article above states, you can buy 4 GTRs and get change back for the price of an LFA.