Well, I am not much of a biplane expert; although the used airplane I bought was a Rose Parakeet, real cute and agile, but a little too "open cockpit" for our weather here.
I love the look and history and arau of a Stearman. I also have seen that a Great Lakes is easy to fly. Some of the classic Waco biplanes are awfuly nice, too.
I had a very brief flight in a Eagle and did not connect with it.
The most impressive acro Bipe that I have ever been in was an old Bucker Jungmiester. Talk about a fantastic flying airplane, and neat looking also.
Good luck.