ati bm 250 would be perfect for your 330g,
very quiet,
ours in the store i work at releases no bubbles back into the sump,
the skimmer is a bad ass performer (2500lph air @ $769).
it would smoke the deltec turbo 1060s easily (1500 lph of air @ $1600)
and is even less money than the regular turbo 1060 (900 lph of air @ $1100)
and twice the power.
and again, there are no microbubbles coming out of the return of virtually any ati bm skimmer, especially the newest generation. mabye a few for a day or 2 at breakin, but that's it.
and the build quality would be the same as deltec (i've never thought deltec build quality reflected their price).
the only issues the ati's have is potential restart issues with the pumps, but if you know the tricks to restart it, it's not a prob. well worth dealing with for the performance and power you get.