I'd have to agree on an Aquaclear and I have an Aquaclear 30 on my 10g and 20long. I run a piece of sponge over the intake on the 10's AC30 to slow the flow some. I've had the following HOB's in the short time I've been back into the hobby: TopFin 30 (whisper), Marineland/Penguin 100, two AquaClear 30's and an Aqueon 50.
IMO, the Aqueon is the best if you want to stick with cartridges. Aqueon cartriges are easy to rinse and reuse, are reasonably priced, especially when on sale and Aqueons will fill and start themselves given how the pump is placed on them. I can't say they're my favorite HOB though.. AC's can be quirky with noise and pump issues, but I don't think I'd buy anything but an AC for a HOB going forward.