Are you gonna use this as a display tank? If so, I'd just build a sump for it. I don't have any recommendations for one but I'd see what others have done and build it. I like DIY projects and sump would be pretty cool. Somebody posted some pictures of a DIY sump in the planted tank section, and it looked pretty nifty. I'd do some searching around and see what design you want to build off of.
http://forum.simplydiscus.com/showthread.php?t=76660
Eddie