Depending on your budget you can get a Denon 2910 for appx $500 that will complement your plasma exceptionally well with the HMDI output. Considering its appx 10% of the cost of your display I think that it is probably the best chioce and I don't feel the scaling ability of the plasma when used with a sub $300 player will best the picture produced by this DVD player.
My 2 Cents
My 2 Cents