The Joe Blow Ace is the top dog floor pump from Topeak.  The My Mountain workshop using these exact pumps and ours hasn't missed a beat in 6 months of hard use.  And to qualify this we can usually break a pump within two weeks.  The Topeak JoeBlow Ace's three stage system isn't just a gimmick and is actually quite handy if you pump up road tyres as well as larger volume, lower pressure tyres such as mountain bike wheels.

From Topeak:

The latest addition to the legendary JoeBlow™ line, JoeBlow™Ace features an innovative three-stage design that achieves both high pressures and high volume in record time.
Stage one opens both barrels for big volume to reach 60 psi with 30% less effort than standard floor pumps.
Stage two uses the main barrel only for pressures up to 120 psi while stage three engages the small barrel to achieve an amazing 260 psi.
Padded handles, wide, stable base and large dial gauge make inflation easy. SmartHead automatically adjusts to fit Presta and Schrader valves without swapping parts. Includes ball and air bladder type inflation needles.

Not recommended for use on rear shock or fork.