I've had a T8, and still have a JetZ and Hardy. The Hardy is the most handy, bu definitely noisier than the other two. In fact, painfully loud for protracted shooting without hearing protection on a 6.5x55.
I think the T8 was probably the quietest, but certainly the heaviest.
Agree if you look at the thing weight ballance size got to be the best bet for a mod, I'll get one soonIMHO, the Hardy Gen IV is the best mod around at the moment. It's light and over the barrel, and reduces noise sufficiently for what I need. Yes, there are cheaper, lighter or quieter mods on the market, but I wanted a balance of all the elements as I carry it more that I use it!!!