I have a home made one now, the reason I swapped was the flow rate I wanted to use, the drip plate on that model didnt allow enough water through it for my tank, on their website they state a max gph for each unit, besides I needed the money
I just bought the aqua clear 75. It is pretty nice. I have a 55g and it works great. I still have my two penguin 330s running, but will cut them out in about a month. I also put two 100 watt heaters in the wet dry. It barely fits in there with the pump, but my tank looks pretty sweet. I am hoping the guzzling noise going throught the pre filter will quiet down with time. Overall, its sweet and fits under my tank in the stand.
If you get an Aquaclear wet/dry, get one rated higher than what your tank size is. The one that Nate had used to be mine, and I had it on a 75.
As far as increasing the flow rate of the filter, you can always drill out the holes in the drip plate to accommodate better flow. However, most pre-drilled 75's only have a 1" drain hole, in which case you are limited to the amount of flow you can run by that, more so than the drip plate.