I have been eyeing the LC500 to replace my F80 as well. All the reviews of it have been stellar saying its better than an aston at a fraction of the cost. Once my GT3 comes in I might make that move.
I need to drive one and see how it feels. 4400 lbs and 390whp is going to feel ALOT slower than a F80 M3. hopefully the ride quality and steering can make up for it. The car looks great imo. i'd like to pick one up in a year or so when they are in the 50s