your the leader of the fishes. I'm sure you know which one is best. I don't know what type of tank you have going, but I reccomend either the emporer or the penguin. Some have stated that they're crap, but biowheels are actually some of the best filters, not only in my own experience, but in those of other more experienced hobbyists and experts. If the aquaclear is what I think it is (a regular HOB power filter) then there really is no point in getting that over one with a biowheel.
Lets take a closer look at the gph argument. For one thing, the gph of most filters is inflated. Filters never run at the maximum gph stated by the company. Gph is reduced by many factors, including age of the filter. Since the true gph has not been accurately measured by anyone in the forum, and we know the gph stated by a company for their filter is inflated (and who can trust business anyways), then the gph argument is not very significant.
Also, if you notice, the tank size rating for each filter changes by company even though the gph rating is the same. This is not because one filter is inherently better, but because the company decided thats the size tnak it could service. If one company says its 100 gph filter is good for uip to a 20 gallon tank, and another says its 100 gph filter can do a 35 gallon tank that does not mean one is better than the other. They are both same, with the same capacity and in reality are not even good enough for 20 gallons. The tank size rating is invalid and always inflated. Therefore, the argument that an aqua clear is better because it can filter a bigger tank despite having the same gph as another filter is a lie.
Then theres the "maintenance" argument. Really, if you have trouble servicing your biowheel and think it takes too long, then you probably shouldn't be messing with it. Biowheels are just as easy to maintain as a regular power filter. Not only that, but with the biowheel you have super powered biological filtration. Biowheels are, at the moment, the leader in practical biological filtration.