We watch a lot of HD sports.
DLP sharpness and motion handling are a good match for sports.
We have the Sharp Z30K and it excels at HD sports. As a bonus, it has state of the art 3D. We watched Wimbledon in 3D. Incredible!
Also, the powered lens controls and placement flexibility make it easy to use. Top it off with a 3 year warranty.
For <$2K it's tough to beat.
I have not seen the Sony, so it's tough to say.
Art at PJ Review had the Z30K as best in class for <$2K.
If you look at the Z30K thread, there are comparisons there. The main complaint seems to be less than accurate color. If that's important to you, then the Sony is probably a better choice (cost not withstanding). The color on the Sharp seems great to me, but I'm not anal about it. If you add the Darbee, the picture is stunning on our HP screen.
Here's a list from PC of FPJ's that can do 106" @ a 20ft throw.
Not too many on there under $5k. The Sharp that humbland mentioned (which I also own) is.
I also have not seen the Sony but can concur that the Sharp gives an awesome picture!
Having that far of a throw and size screen, most projectors will be close to the limit of the zoom and you'll end up w/ a lot less light on the screen. You may want to consider getting a High Gain screen.
Both humbland and I also have High Gain screens and it helps increase brightness and makes sports look great!