I went from a HEQ5 to an AP900, the precursor to the AP1100. The mount just melts away into the background and if you setup your scope right and your PA is good it just does its thing without a murmur. Your limiting factor as Matthew says then becomes what you are using for guiding...Thats what has an impact on what your images look like, oh yes, plus processing..plus camera...plus optics. But your start point, the AP, wont be the problem.
Check the various sites for what the capacities are for the 2 models. Both will deal with what you have now. Its then just a case of what you want to do in the future. After all, if you can save for that mount, that wont be the end...
