As a fellow Anhedral flier, I'll comment that I feel like it provides some benefits in outside/pushing maneuvers and inverted flight. It seems to make the rudder correction feel like less work to correct while maintaining heading and attitude...
What are the advantages of a straight stab over the anhedral stab.....? Can't think of one.
It is also quite sexy looking...
Also, I do not believe that the kit is offered with the straight stab. If desired, I'm sure a custom version could be negotiated, but why would you want to build a plane any other way than the designer intended?
Richard