I prefer BigWigs. Lots of customizable options and intermod communications if everyone uses the same thing. BigWigs Boss modules are also load on demand so they don't all load at once and lag your system. I'm not sure about Deadly though I had a guildie that used it and I didn't prefer the data it spit out.
-- Six Demon Bag Jack Burton: Hey, what more can a guy ask for? Egg Shen: Oh, a six-demon bag! Jack Burton: Terrific, a six-demon bag. Sensational. What's in it, Egg? Egg Shen: Wind, fire, all that kind of thing!
I'm prejudiced in that I hate all mods that aren't Ace based. Guess I "jumped on the bandwagon" or whatever, but I've never been able to use so many mods with so little overhead since I switched to mostly ace-based mods.