Please read the OP - the purpose of the TV is Xbox and sport.
If you take the time to read my posts, you would understand I maintain that there is much less of a difference when hooking up HD sources/Xbox/etc. to either LCD, LED or plasma. This creates a problem where you base testing solely on a source that does not differ much on HD TVs, hence the tone of my previous post...
The fact that plasma is best for SD TV/sport means it would naturally be plasma's strongest selling point. And the OP did say TV/sport.
But not necessarily SD sport (not to create more conflict... just pointing it out).