Regional SD channels too seems fine. Better than my 2.5 yr old Samsung 32" C530 1080p LCD at my parent's place. Overall I am satisfied with the picture quality for SD and HD.
But then these things are always subjective and better to compare them in person before deciding.
Nope I don't have a wireless KB or Mouse. But the store guy said it will.
Based on my usage the HD content looks pretty good on the TV and SD quality is also good. So in this price range its a pretty good package considering the competitors features and pricing.