MTX has always made good stuff. I recommend the MTX since you already have MTX amps. That way your amps will all turn on at the same time. Using different amps can sometimes result in the front end or bass coming on out of synch, unless you have a synch output on all amps involved. You could just time both amps as to how long it takes them to turn on if you really want to use a different amp. If its a big deal to you.
warmonger