Ashford, you'll have to let us know how the 1930 does with upscaling and deinterlacing. I had the 1910 a while back and thought the deinterlacing was pretty bad compared to my InFocus SP4805 projector. Hopefully, two generations of the player later, Denon has got things in order.
Rcently got the Oppo 971 player and it does a better job of deinterlacing than the SP4805. The upconversion at 720p also looks beautiful on the projector. Enough so, that I could care less about the HD formats.
So...my answer is DVD player if that is the primary source you watch.
However, I am now trying to consider in my setup how the Oppo would stand up to a quality deinterlacer such as the DVDO VP30 or getting the Gennum deinterlacer\scaler upgrade for my Anthem AVM30. I am leaning heavily towards upgrading the AVM30 to have everything in one box. The advantage to this (or to having a really good deinterlacer/scaler in the TV or projector) is every source you run through the unit will benefit from the deinterlacing/scaling, not just the one DVD player.
Sony makes good TV's. The 53" rear projection unit I have had for about 12 years now is still kickin' and still looks great. Congrats on the purchase!
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Doug
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