Hey,
I've only dj'd house and techno music, so my turntable skills are limited...but I do know that you need to get DIRECT DRIVE turntables if you're going to be doing any serious turntable work. Direct drives are driven by a big electro-magnet, that way there is no physical contact between the motor and platter.
I have mixed feelings about the Technics; they're VERY expensive and only have a few features besides DD motors and pitch control. Some of the newer ones by Vestax and Numark (among others) offer steeper pitch control, reverse, digital outputs and a bunch of other neat controls that allow you to pull your records in ways that you couldn't do so easily on the 1200's.
Seriously, you can almost buy two of the other brands for one of the Technics...
Another thing to consider is your mixer. I've never needed anything more complex than something with eq and crossfadable cueing; my hip hop buddies are way into optical faders, frequency kill switches, hamster switches, adjustable ratios on the fader, reversable faders and switches, etc. There are some killer mixers out there for under a couple hundred bucks, the fancier ones allow you to bring effects into the mix.
Take care,
Nick