well, your other option is to buy the eshopps and to replace the pump with something nicer, scince it already fits.
I would look at using a QO 1200...
think of it as a small mini laguna pond pump, but made by sicce for pentair. the thing that makes this pump so damn cool is that the impellar floats free without attaching to the volute, and that the impellar well and outlet are larger than a maxi-jet. so if you mesh mod the impellar and make a nice venturi from the volute, you'll easily get around 300+ lph of air and lower the watts.
or you could use a sedra 2500 pinwheel pump on it...
(asm's replacement pump for the G-1)
I havent seen the newer version of the ASM mini w/modded rio pump... but the sound of that doesnt excite me much...
the other thing you could do is use a nice small hob skimmer like the new WM H1 that's going to be available in a few weeks. the pump sits in the body so only the inlet and outlet would sit in the AIO's sump compartment. again, it uses the sedra 2500 pump, but WM's mods on it are top knotch, and the skimmer design is sweet. i think it's going to street for $250 but dont quote me.
Well worth every penny...