My dream bow...well:

32-33" ata
8" or so brace height, not less. So as TFOX stated a deflex riser might be needed
Instead of one grip I want many, many styles I can pick from and play with. Included with bow, of course.
320fps @ 28" draw @ 60lbs chucking a 425 gr arrow (yeah dream time)
Draw cycle like my old Hoyt Fastflight with Control cams (btw I'd buy that bow back from whoever I sold it to )
4.5 lbs
Adj let off with 50, 65 and 80% choices without needing a press.
Adj draw length (without a press) to cover the full spectrum.
A TWO piece quiver
Of course quiet and shock free with no bow movement on release. I want to hold my pin on target till the arrow arrives.
A solid wall and forgiving valley.
The last thing I want that will make it so much different than todays bows is one that fits my budget.