"To me the Acclaim seems like a great airplane if you value raw speed over other considerations: climb rate down low, pleasant handling characteristics, conventional pitch and yaw trim systems, larger cabin size or lower stall speed. I've flown Mooneys; their cabins make Glasairs seem big.
You have to wonder what Mooney could do if they employed a longer-span, higher aspect ratio wing like Cessna and Piper did to their airplanes a generation ago. That change could lower their approach speeds and let the plane climb better —especially up high. Well-placed/-sized winglets could offset the higher induced drag of such a wing and would have more space on the trailing edger for more effective ailerons and larger flaps.
I do not know if it is the case with recent Mooneys, but a 'C' model I flew had a full-time wing leveler which made roll control very annoying in turns. The Mooney handles like a Seneca, which is probably good for hard IFR but it becomes annoying if you don't have an autopilot.
Another consideration is price. For the cost of a shiny new Type S you can buy a 2003, all-glass Lancair 4P (see controller.com) and have enough left over for a modest home, an automobile and $$$ for fuel. The '4' will blow the doors off the Acclaim up high in ISA conditions and should be competitive in the mid-teens as well. It also offers much better useful load: it carries four normal-sized occupant, full tanks and full baggage without operating outside its C of G envelope. Whatever, er, floats your boat...
A quick note of feedback to Robert Goyer. Airspeed control is important for good landings in ANY aircraft.! 800FPM doesn't seem that impressive near sea level, but certainly does up high. I've never flown an Acclaim but I did fly a '201' at near MTOW and was able to fly approaches with power at 75-80 knots into a 2100 foot strip in fairly smooth air. I had little trouble making acceptable landings, which I value over greasers anyway. Perhaps it is your technique, rather than something inherent in the Acclaim, that gives you trouble landing it. Once you've reduced to final approach speed, try retracting the speed brakes; you won't need to use as much power to stabilize the approach"