The way I see it (just guessing and rounding on most parts):
Thats about $9k (which hopefully includes installation). I could (hopefully) sell mine for just above $30k and buy an M3 for around $45k.
If I put all that money into the 335, its completely lost unless I part it out at the end...which I wouldnt.
hmmm, I think I may have made up my own mind