If you end up buying one online.... I recommend WWW.bigalsonline.com!!
What a wonderful website and great prices (shipping is really low too!!)
I bought a Eheim 2026 for my 50 gallon Turtle/Goldfish/apple snail tank and I love it!!! I have a huge bio-load with the inhabitants in this tank, but the filter is awesome!!! and super quiet too. Can't go wrong with an Eheim!!! Good luck!!