on a serious note, u might want to -pause- things a bit and do some thinking.....80k is a big amount and if spent the right way ( too many permutation - combination's possible here)...Also how soon do u expect this thing to get upgrades ? with the rate at which new things are coming out these days , this elite setup will have dated stuff in the months to come.
If i were u sitting with 80k i would-
-for download operations make a headless atom and leave it aside on secure wireless.
-make a htpc only for movie rendering and freaking buy a elcheapo vu hd tv (if u already own a lcd tv - viola)
and
-make a 3rd system for rest of the needs and then upgrade the same as and when needed.
Again, thats just my outlook. might end up spending 10-12k more but then that would be totally worth it IMO.
Edit : just read thru and saw u have no intentions to upgrade in the future , again do give a thought at that.
going way OT but if i had 80k, i would get out there and buy a new bike