okay so im finally looking to upgrade my planted 55 to a canister filter. Where would you suggest I buy it online, where has the best deals? I was looking at a few eheims rated for 100 gals to 160 but ive noticed their gph isnt as high as id like, I have seen cheaper filters ie marine land rated for 100 gals with 350 gph. What would you guys suggest I buy for a canister fo my 55, and where should i get it from?