have you looked up that pleco at
www.planetcatfish.com ? i think they have the best database around on the many,many,many,many,MANY

catfish, including the plecos. That and if you wanted to post in the Pleco forum, i wouldn't be surprised if some other members have galaxy plecos.
Corys like to be in groups of 2 or 3 at least, but they're even more amusing to watch when you have more like 6 or so.
Plecos & Corys generally get along with other fish and tend to produce a little more waste so you'll probably want less than 55" (adult size) total in fish. Butterfly is much more knowledgeable on plecos than I am, along with a lot of pleco owners, so i'd say a post in the pleco forum would get you answers to any questions you have that i've not answered.
