I've had Yamaha Stage Customs since '97; I've got a set of Pacific CXs on layaway, so I guess I can offer a comparison.
With all due respect to fritzmusic, I'd like to offer some differing opinions. First, while the wrapped vs. lacquer argument has been around for a while, it would be difficult to hear the difference in a blind test. Head choice, shell composition and tuning makes 95% of the sound.
More important in my mind is if you'll be gigging the kit or not. If you are, a wrapped kit survives being moved a lot easier.
Regarding tom sizes, the most common are 12/13/16 and 10/12/14. Both are common enought that prepacks of heads should be equally easy to find. The latter sizes will be cheaper, of course.
Right now, you should be able to find significant bargains on 2003 Stage Customs and Pacific drum kits as both lines had significant changes introduced. The Pacific lines (CX and LX) are all maple as opposed to the mixed birch/falkata of the Stage Customs, and hence has more 'respect' as a higher level kit. What is most important is how the kit sounds, and which one sounds the best to you.
Brand new CX kits are going for $700 on eBay, and I bet you can find them locally for the same or less. DW sold the remainder of last year's stock to their dealers for deep, deep discounts.
Used kits are even cheaper. I'm selling my current Stage Custom shell kit 22/10/12/14f/14s for $400 and they're in perfect condition. You should be able to find a similar kit for around the same price.