The HT3050 comes from the factory with a calibrated picture mode that promises 100% rec 709 color gamut coverage with dE error of < 3. It also has better internal speakers.
The HT2050A is technically newer but, really, it is a refresh of the HT2050 which debuted alongside the HT3050 a couple years ago. Still, it gets a significantly longer warranty (3 years vs the 1 year of the HT3050) and a new “fast mode” which drops input lag from 33ms to 16ms.
Personally, I’d go with the HT2050A. The difference in color fidelity is appreciable but not something most people are likely to notice unless the projectors were side by side on the same screen running the same content. If everything else were equal I might feel differently here but the lower price when combined with a longer warranty and less input lag makes the HT2050A the winner in my book.
What to do if you find yourself stuck with no hope of rescue:
Consider yourself lucky that life has been good to you so far. Alternatively, if life hasn't been good to you so far, which given your present circumstances seems to be more likely, consider yourself lucky that it won't be troubling you much longer...
-- Excerpt from the Hitchhiker's Guide to the Galaxy.