with any RC or Newt you will need some sort of corrector to fix up those corner stars. as far as collimation goes, i am not sure a truss RC would be easier to collimate. with a good laser, Newts are pretty straight forward to collimate. but if it were me i would stick with your 6"RC if the only concerns are collimation. stick to it, maybe get a TAK collimating scope and invest in a corrector.
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