Hey people, just thought I'd bring it into the light that you don't know what you're talking about (most of you)... you can't truly judge Alexi's singing voice because in CoB his voice is locked into an almost constant animal scream. In Flames's singer goes all over the place. Kimberly said in an interview that Alexi has a very good clean singing voice but refuses to use it for CoB because it wouldn't fit the rest of the band.
However, on Follow the Reaper his vocals are partially clean constantly, and you must be deaf to not hear the amazing talent (especially since HE'S PLAYING GUITAR TOO)! In Flames's singer is just a singer I thought (therefore, unfair comparison: one instrument is infinitely easier to handle than two!).