Good siwash hooks will hook better, you'll lose a lot less, and they don't get tangled and stuck on everything else...plus, in many places you can't use treble hooks.

Bell vs. weighted...it depends on what you're doing with it. If you're fishing still water, or very slow/shallow water, then the bell design will be easier to use...the deeper or faster the water, the more you're going to need a weighted body to keep it down.

Split ring or no split ring...I prefer one, but don't think it matters much...just aids in swapping the hooks out when you need to.

Fish on...

Todd