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If you are just interested in planetary rather than wide field viewing then a normal SCT should be just as good optically as a Meade ACF or Celestron EdgeHD scope. Planets are small and the optical changes in both relative to a normal SCT are about improving the off axis views rather than the on axis views (although the EdgeHD is now better ventilated than the older Celestron SCTs I believe).
If you want to go into imaging, focus (bad pun) on obtaining a big steady mount with smooth periodic error. Talk to bird, gregbradley, strongmanmike and the other great imagers who frequent this place for recommendations.
Lastly, the links I posted in my previous message weren't mine, all of the good stuff came from other people. Kudos and thanks to them!
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