I just purchased the 5-fin torpedo HH kit, If you can get your size right, and your velocity right, it turns your marker into a tack driver at ~80ft. This means one shot and if its off you can adjust and the next is a hit (this is with no sights). I love mine.

Now, if you will be shooting crappy paint, and dont want chops(mixed bags, old balls, brass eagle ^^) the smoother and larger size bore the better. So the PB would be the choice.

In conclusion, if you take the time to buy your paint, and size it... then adjust your gun, you will love plinking people with 1-2 shots and the rest of their squad not being sure where you are. (i play woodsball,cant comment on speedball etc...)