I think Fisher has had a bad rap just because the material they released after Chris wasn't as tight as the first few albums - but Kill is actually a really, really strong release. One of the best Cannibal Corpse albums ever, seriously.
Fisher's voice works well for the new stuff, he looks good on stage too which is always a bonus. Barnes did a better job on some of the classic CC stuff but overall I like Fisher more.
whoever does the vocals on 'tomb of the mutilated' sounds like water gurgling down the bathtub when you pull the plug out... it sounds comical.. i've never thought much of their 'music' anyways..
Chris Barnes definetly. Corpsegrinder isn't that bad, but his vocals got really stale...really fast. I haven't given them a good listen in a few years, probably not anytime soon either.