Post an actual list of what you're buying. I bought my stuff DIY from RapidLED, and they were great in helping to walk through how to set them up and the parts you'd need for what you want to put together. If you haven't set up DIY LEDs before, I'd recommend going to the RapidLED site and going to their LED University links, where they have some articles on how to set up LED strings.
For your LED choices, 2 cyan is WAAAAY too much. With the number of LEDs you're doing, I'd probably do 4 RBs, 2 NW, and one cyan, or a mint if you can get it. Since the cost of an extra LED here or there isn't very much, I'd recommend picking up 2-3 additional colors just to put in the mix to play around with. (With RapidLED's solderless LEDs, swapping them out is as easy as unscrewing, unplugging, and replugging and screwing in the new LED, no soldering!).
I like dimming drivers, but make sure that your source for dimming matches the driver (i.e. if you have an Apex or Reefkeeper, you need 0-10v, if you have a bluefish or some DIY Arduino, you need something controlled by PWM).
Hopefully that helps. DIY LED is awesome, is a lot of fun, and allows a lot of tweaking.
