Thanks, does tomato have better seeding abilities or does it matter?
It shouldn't really matter, mostly a question of which feature set you prefer. I haven't used the Mac s/w, but in WinDoze, the original BT client is a little short on user-friendly features, and I suspect the same is true for Mac. So I use ABC (which isn't available on Mac). Tomato probably has a better feature set and is likely more user friendly, so I'd try it first over the original client.