Raging Bull .44mag owner here
I'm not even a revolver guy but I just had to get the RB in stainless after I saw it in a magazine a couple of years ago (I'm not into SA old school guns and RB is simply not another revolver) it's just gorgeous...
The accracy is great, the trigger I believe DA trigger is 9 lbs (very smooth though) and 4.5 lbs in SA, (seams even lighter since there's basically no pull to it; you just apply the pressure and it goes off, no over-travel what so ever ) Porting almost eliminates muzzle flip but it still kicks a bit (well it's a .44) it also makes for a nice fireworks display...
One can say what ever they want about Taurus but if they don't want to make a fool of themselfs they better not bash this gun; it was the first ever DA .454casul (so .41, 44 and .480 are a peice a cake for the gun to handle). BTW Taurus is making a RB in .500s&w (it actually was supposed to be out by now) so that should pretty much cover the durability part of your question....
The only potentially bad thing I can think of is the size and the weight; this gun is friggin' huge and weighs 55oz (6.5in model), not recommended for shooters with girly hands either. But I really don't mind any of that in fact for me it's a plus.
I've handled Tracker in .22 it looked fine (same finish as on the Raging Bull), but the grip was too small for me and too 'rubbery' I think you know what I mean.
I have to say this is probably not the best forum to ask about Taurus guns since most people here (in Canada) have no experience with them, but many are eager to bash them

. In the US Taurus has a fairly good reputation...
Ruger is a strong gun but redesign is way overdue, basically same ol' same ol' stuff... what else you got?
btw I know there are a couple of people on this froum who have BR in .454 and .480....