I guess you have to decide for yourself what your level of involvement will be, and what makes you happy. You've been a fantastic contributor over the years, so you certainly don't owe anybody anything.
One thing I would say, though, is don't make any decision in a rush. You might sell ... only to find yourself looking to buy similar equipment again a bit later down the track.
I don't know how much you get out to club nights and star parties, but maybe talk it over with a few other amateurs face to face ... to help crystallise your thoughts?
