Ive had the following barrels.....30, 28, and still have the 26 inch.
I prefer the balance and weight difference with the 26" barrel the best.
Although i find it a little harder to shoot trap with since i have to move a bit more, but hey i was a pretty crappy trap shooter from the start.
Not really sure if this is something weird that happens with me but i find the gun seems to shoot a little higher now that i have the shorter one on.
Cant comment on ballistics but im definatly happy. PM if you have anything else to ask.
IanC