It's not really very complicated. I'd suggest going with a respected brand like Technics, Sony, Yamaha, et al. I prefer belt drives because they're quieter and the things that do break are usually just a cheap belt, which can be quickly replaced, and not some complicated motor part that you'd have in the direct drive.
I've only seen belt-drives with the speed adjustment, but maybe they make them for direct drives too. In any case, I recommend getting one with a speed adjustment knob.
Beyond that, the most important thing is to get the best possible cartridge you can afford. Best for the money in my book: Grado blue series. Whatever you get, make sure its tracking force is light--under 2 is good.
Here's a link that might help:
http://stereos.about.com/od/gtgtturn...oosing_tts.htm