To clarify, My Mits is a 2007 DLP. We do miss the extra 3" a little but I'd do it again tomorrow.
The Sony has a crisp detailed picture, off-axis viewability, blacker blacks, lack of color wheel, and the integrated features (internet, Netflix, etc..) made it a very easy decision.
When we bought, the plan was to buy the Sharp LC70LE847U, but this new Sony was there ($200 more) and we compared the two.
In our opinion, in the store, with as much processing turned off as we could figure out how, we liked the Sony better overall.
The Sharp has a better off-axis image, and looks better close up. But at viewing distance, the Sony looked better to us, and it had much better blacks. Both are 240hz TVs, but with all the processing off, and running passthrough on our TV and receiver (plus I have heard Sharp isn't in good financial position these days) we decided to go with the Sony. So far, very happy with the decision. The Dark Knight looks like a different movie going from the DLP to the Sony.
I do think the DirecTV client in the TV is a bit of a waste. After all, most people will have it co-located with the Genie DVR (we do). But if you've got multiple big-screen TVs it would be very handy, and save you $6 a month client rental.
I will certainly let you know how the bulb replacement works out. The plan is for our 18-year-old daughter to get the Mits so she will have a big TV. She's thrilled.
All the best!
Sony KDL-70R550A, Onkyo TX-NR709 as preamp, Sunfire Cinema Grand power amp, Martin Logan SL3 - fronts, Martin Logan Cinema - center, Martin Logan Mosiac - surrounds, SVS 20-39 PC+ & PC12-NSD Subs, Sony BDP-S580 Blu-Ray, Denon DVD-756 for DVD-A, DirecTV HR-34 (Genie), Sony v2 Google TV.