I'll jump into the debate with three words: Audio Ease Speakerphone.
If, during a mix, you want a sound to come out of any kind of speaker, in any kind of room with any kind of background ambiance, this should be the first stop, IMO. You can construct your own chain in a few minutes and the variations are endless. You can even virtually rotate your mics. And the booth stays clean.
This is probably overkill for the OP (500$), but one of the best investments an audio post mixer can make.
JC Boulay
Technical Director
Audio Z
Montreal, Canada
http://www.audioz.com