my two cents, hope ya like em
Scubadude pretty much covered it all, the only things I would add would be:
55 gallon would be the bare minimum, I would advise bigger, and also for weight, 1 gallon equals about 10 pounds. so a 55 gallon full would be close to 550 pounds, plus gravel, rocks, light, filter(full of water a large filter can be quite heavy in it's own). be sure to get a strong stand, I have a 75 gallon that I estimate weights close to 1000 pounds.