RE: Which biplane?
I have a GP Skybolt and it is a nice plane (OS 91 FS), I also have a GP Ultimate 40 size with a OS 70FS. Out of the two the Skybolt has the looks, but for ease of transportation and fun flying it is the Ultimate. Ultimate kit goes together quickly and it is easy to assemble at the field. If you have never built a bipe, get an incidence meter if you don't have one. It is a must for bipes.
I have a CG Ultimate in the box and hear nothing but great reports.
The planes mentioned above are all good, I guess it comes down to Rickstubbz point about what you are looking for.