I know that people who work with Discus regularly can only make a best guess, just thought I'd ask. I have a male I wouldn't mind finding a female for, but my guess is yours may be a male too. From the bold color and length of pelvic fins I can only assume. Next time I cross the river I'll have to stop thorugh if possible. Its a Hans discus, so anyone willing to trade gets a nice specimen.
Yeah, they're more likely to pick on someone who looks similar because they're seen as competition. Probably male-male fighting then. Worse comes to worse you could bring him to aquafest and either show him and talk to people who comment on him, or enter him in the auction. There were some nice discus at the catfish convention last year that brought pretty high bids. Hopefully someone will take you up on the offer. Jamieishard is the last person I know who was looking for discus...