For Hunting, Some what quiet, 330-350 speed,not super heavy.
This will be for next season.
Taking all that you want into consideration, the Parker Tornado is nearly a perfect fit. It is quiet for a crossbow, but you will need to add string stoppers. It comes in at around 340 f.p.s. and it is light enough to carry a long distance.
There is a new bow that might fit as well. Parkers new for 2011, Hornet Extreme. It is subject to final development, so I don't have all the details on it yet.