hi rob,
welcome back to the hobby.
the sony sensors are super clean. not too much else has changed i would suggest. the new skywatcher AZeq6 might be worth a look.
there are some good cooled planetary cams now check out the zwo range
http://astronomy-imaging-camera.com/ even the 120mm is capable of superb results.
planetary software programs: registax 6, PIPP, autostakkert are probably the main ones as well as winjupos for planet derotation.
can't think of too much else at the moment, not sure on the funghi cleaning i'm afraid! maybe get some sunlight on it (remembering to remove any eyepieces). how about a 10" carbon fibre newt with a quality 5x powermate for a scope?
cheers
russ