You won't likely find better than the w1070 for a mix of bright, fast (motion and lag), and clean 3D. For about $1200 more you could grab a Sony hw40es, but it's main advantage (darker blacks) will mean nothing in a lit room. The other DLPs lack the full color-brightness of the w1070 while the more expensive tend to suffer higher input-lag.
Depending on your room, the Sony hw40 WILL allow a longer throw which makes high gain screens look better, but you'll lose brightness for it. What's the gain on the g1?
There are a few LCD that are even brighter than the w1070, but they'll lack the gaming performance and clarity on 3D.