Matt,
A hard call.... I'd suggest a G-11, without Gemini or Vixen GPDX or current equivalent and a good 4" APO to 6" Maksutov that you can afford after that. (sorry $5k may not quite cut it)
GoTo is nice, but sucks when it doesn't work, and is simply not required for imaging....BTW the best portable imaging mount I have used was Losmandy's GM100 (tangent arm Dec). Zero GoTo, but it responded *instantly* to any guiding corrections ..I sold mine....sigh...it's living happily in Queensland now I believe....
By the way, wide field may not be cheap either, Canon L-series glass costs as much, if not a good deal more, than many smaller 'scopes
Cheers
Peter