Check out
http://www.stark-labs.com/phdguiding.html
http://www.stark-labs.com/
Not a bad place to start reading up.
By guiding do you mean autoguiding with a second camera and scope?
You may want to check the forums and download some fits files or tiff files and practice processing while deciding what gear you are looking to purchase.
Acquiring images is only half the battle, stacking, stretching, deconvoluting and otherwise processing images is where the magic happens. You may as well get a handle on that while you're waiting.