every instrument has its good qualities, it's all a matter of preference. fender has benn making great guitars for fiftey years, so has gibson, i don't know how long ibanez has been around, but some some of their guitars are of high quality. everyone has their own personal choice. Jow Satriani and Steve Vai like ibanez, Eddie Van Halen, Yngwie Malmsteen, Ritchie Blackmore, Eric Clapton, Stevie Ray Vaughan, and others like fenders, while John Petrucci likes Ernie Ball, and Carlos Santana likes PRS, and still many people like Slash love Gibsons.

if you don't like a brand, it doesn't mean they suck, it just means that you prefer another kind. i personally don't like ibanez's neck and the sound i got when i played my friends ibanez, to me, didn't even come close to my telecaster. but that's just me. i don't go around saying ibanez sucks, just because i don't like them.

also Korn's music can be played on any kind of guitar, if you check out the issue of guitar world where it's tabbed, you'll find it's tabbed on a six string.