Honestly, I got my 55g from walmart. I LOVE the stand you can buy. Including the stand, filter, lights (only 30w total, but enough for a fish only tank) and all were only 230. I've replaced the filter with a fluval 304 (from bigals for 80bucks), but even still, thats so much cheaper where I live than buying the pieces separate. Actually, all my tanks are from walmart. They're great imo - obvioulsy not the BEST filtration (on the 29 and 55) but still good. I use the filter that came with it for the 29g.
You can see the stand you can get at walmart on my website in my sig. Its black and has four cabinet doors and quite sturdy.
EDIT: online sites: the price will be cheaper, but add to that the immense shipping of a 55g tank/stand/hood!!!