I have been where you are.
2 things to keep in mind when buying a brewpot.
#1 When buying a brew pot - Bigger is Always BETTER (within extremes)
A lot of people assume if I get too big of a pot, my stove won't be able to boil the water. What they fail to realize is that except under extreme circumstances, the size of the brew pot has NO effect on how well your stove will boil water. The amount of water you put in the pot effects that.
Just because you have a 10 gallon pot, does NOT mean you HAVE to put in over 2 gallons of water.
#2 what material to use when buying a brew pot.
Some people ONLY buy stainless, But do not put down aluminum. Some brewers swear by it. It is a long debate here on the forums, but the aluminum heats water a LOT faster than stainless. Also with the length of time the water is in the brew pot, there is very little chance of it picking up any taste from the aluminum.
As far as links to pots. Ill give you 2 good ones. Stainless or aluminum.
10 Gallon aluminum Stock Pot
10 Gallon aluminum Stock Pot Lid
10 Gallon Stainless Steel Brew Pot WITH lid