The Philips is probably the best in the $50-70 range, but I've found the best overall value is in the Sony 775. It's got the best DAC for the price range by far, and includes good support and features like SACD. The cheapest place is Amazon.com, for $116 right now.
A good 480p player is better than a low-end upscaler (the Philips) for overall picture quality. The only disadvantage is no DVD-A support, but you shouldn't expect that for less than $150-ish. Also, a cheapass DVD player won't give you HDMI/DVI outs.