It all depends on your budget. As you get much over $300, it would make more sense to invest in a $499 HD-DVD player which upconverts standard 480i dvd's.
There are some good deals on older Denon players, as well as Panasonic's S77 and S97 players. The Oppo players are tops for the bang for buck arena. For $150, I'd probably get an Oppo.