Hey there! This is just my opinion, but at that price point, (since Gibsons are expensive) for a new instrument you'd be looking at the Les Paul Studio - which is bare bones but still a great guitar! You could also try to find a used Les Paul Standard in that price range.
BTW nice collection you have already - I'm jealous!!
Good luck with it!
Mike
Keep rockin!
Mike Olekshy
GT Guitar Coach