If you can afford it, I would suggest running two Marineland C-360 canisters. Combined, they will support up to 200 gals. If you look around online or from a LFS such as PetSmart, you may find them for ~$100/each. The higher priced versions from Hagen Fluval like the fx series are some of the best canisters on the market, but you will easily spend ~$350/each (that I can find online).
You can also run a setup like sawickib mentioned, with 1 canster and a large bio-wheel.
Can't wait to see the progress! Will you be starting a freshwater journal?