As one of the guys who went through amplifiers like candy I can tell you long term reliability is unlikely.
I went through 6 amplifiers on 1 of my MFW's and 4 on the other. BOTH now make noise and will likely die the same death the previous amplifiers died.
The MFW is a great sub with a poorly excecuted amplifier. I'm saving up for the Turbo upgrade for both of mine but there is no way in hell I'd buy one with an AV123 amp in it, unless it was dirt cheap.