Just wondering which one out there is the best for the buck. I usually buy Sony products, but have no problems with Philips, RCA, Panasonic, or some other brands. I would like one with a 7" screen, and one that plays MP3's. Any help on this would be greatly appreciated. I don't want to spend money on something that I'll be disappointed with later. Price range: No more than $300. That comes from the wife, so I've gotta be good and come in under that price. Thanks in advance for the help.