T410 seems a bit old at this stage. First gen i5; think the 14" ThinkPad orders goes something like T60>T61>T400>T410>T420>T430>T440 etc.
Guess those old ones are sturdier than the newer ThinkPads though.
Have you considered the 15.6" models? (T520/T530/T540p etc.) The extra space can make things a lot easier on the eye. Less availability though.
In terms of HP or Dell: well, their business line tend to be similar to ThinkPads. In HP's case the equiv of ThinkPad T's is the EliteBooks; for Dell it's the Latitude range. In all cases, I would avoid the entry level business lines (ThinkPad L's or E's, HP ProBooks, Dell's Vostro and *some* Latitudes too).
For your budget, you should be able to pick of Ivy Bridge (ThinkPad T430/T530, EliteBook 8470p (very well made and sturdy but heavier), Dell E6430), or Haswell (ThinkPad T440/T440s/T540p), EliteBook 840G1/850G1, Dell 7440
AFAIK).
Unfortunately, most likely most models will be 768p.
Note that both HP and Dell have other business grade lines, for instance HP's ZBook or Folios, or Dell Precision workstations etc., but those are rarer and harder to fit into your budget. A lot of them are likely to offer resolutions higher than 768P though.