5" 5.5" 6" APO practical considerations

1. I live in suburban Toronto with light pollution
2. To view planets +- binoviewer
3. To view DSO
4. Light Alt-Azmth (?Giro-2)
5. Easy set-up and not too heavy (50-60lbs mount + scope)
6. Webcam astrophotography of planets
7. Future considseration for GEM and CCD astrophotography

Currently have SCT-8

TEC 140 (36" 20 lbs) meets the criteria but is an extra 1/2 inch advised - maybe a used AP 155 (41" 24lbs)?

My own experience is that you really want a
drive for high-power planetary stuff. You'll get
alot more out of your scope with a drive. An AP155
will want a G11 mount, and you'll be way over
your weight restriction. I'd say stick with the
TEC 140 if you are at all worried about easy
set-up and weight; you can probably get by with a
G8 mount.