Did you say that an AquaClear would be coming with the package, or that you wanted
additional filtration to go with the AquaClear?
Anyways, if you're going to have a lightly stocked tank, an AquaClear 70 (old 300) will do the job fine. If you are going to put a lot of fish in the tank, you'll need an AquaClear 110 (old 500). It can't hurt to over-filter.
Another great filter would be the Emperor Power filter with Bio-Wheel, from Marineland. Marineland products are always my favorite.

An Emperor 400 would be just perfect. It provides great biological filtration from its Bio-Wheels.
Any questions? I'm a volunteer at AllExperts.com, in the Animals/Pets - Pet Fish- Freshwater Aquarium section. Feel free to ask me questions there, too!
Good Luck!
One Fish

Two Fish


Red Fish

Blue Fish
