I'd have to agree with the others here who expressed the sentiment that 50 HP may be overkill. If your 2 acres of Bermuda is actually
lawn and not pasture or meadow, then I'd figure you'd have some serious problems with compaction and/or tearing up the lawn (most people don't get too bent out of shape over torn up grass in a pasture).
Also, since you do not envision haying or baling with this tractor (if I read your post correctly) then I'd say a 50 HP sized tractor/frame is definitely overkill.
I've done all of what you described with a TC33D, with FEL, 6 ft box blade, and 5 ft brush mower. I don't have a back hoe yet... it's been hard to justify with my limited needs (not to mention a friend with access to a mini excavator). I had considered the larger TC40D, but the weight for finish mowing might be a problem (especially in damp/wet ground conditions). Also, the larger frame would be a problem on the trails I'm constructing through the woods.
IF you are not looking at doing the haying/baling with this unit I'd recommend checking out the following in the "Big Three's" lineups:
On the smaller end of the scale (safer on the lawn, but takes a bit longer for some jobs) look at: New Holland TC29 / TC33 ("D" model if you want HST), John Deere 4300 (I've not seen the new 4310, don't even know if they've been released yet), Kubota
L3010 /
L3410 (possibly also the 2710 or 2910 models)
If you want to step up a size (Faster at most jobs, able to use larger implements, dig deeper, etc., but more of a danger to your lawn) Look at NH TC40 / TC45, JD 4500 / 4600 / 4700, Kubota
L3710 /
L4310 /
L4610
You can find machines of similar capabilities in other brands. They'd be worth looking at if you've got a dealer in your area.
I think you will be suprised at what these tractors will do, and my guess is they will easily handle your needs, unless you plan to eventually get into the farming-tyoe uses you mentioned (haying, baling) where the extra horsepower is needed.
John