Friend of mine is interested in buying an amp from the Monster Signature Series line...I told him I knew very little about them, but I figured this would be the place to ask if anyone out there is familiar with them....

Are they good enough or should he look for something else and if so ...what does anyone recommend as a better alternative for the price?

What are the essential pros and cons to the Monster Sig. Series amps?

Any help would be awesome!

BTW...he is going to be driving Polk Towers with whatever amp he gets...I think the flagship towers that Polk makes.