The Lord of Lego

Does anyone know any good sites for buying specific lego bricks and minifigs as Lego just doesn't have a good enough selection.

My Lord of the Rings set ideas are Minas Tirith: Cost: 400-500 Minifigs: Gandalf the White, Peregrin Took, Faramir, Denethor, Gothmog, 3 armoured trolls, 1 Ringwraith, 8 Gondorian soldiers Contains: the gate and outer walls of Minas Tirith, 2 siege towers, the grond, thin streets for levsels 1 to 6, throne of Gondor, beacon, white tree of Gondor and Faramirs funeral pyre. Isengard: Cost: 300-350 Minifigs: Saruman, Grima Wormtongue, Meriadoc Brandybuck, Peregrin Took, 3 Uruk-Hai, 6 Orcs, Treebeard, 1 other ent and eagle Contains: thin but tall tower of Orthanc with Gandalfs prison, 1 room, small dam and orc forge Bag End: Cost: 100-150 Minifigs: Bilbo Baggins, Gaffer Gamgee, Samwise Gamgee, Gandalf the Grey, Frodo Baggins, Merry Brandybuck and Peregrin Took Contains: Bag End with detachable roof, gate, round door, 1 room with bed, fireplace, table and cart Please remember these are just some ideas of mine and would probably not be released at the same time. It must be noted that some sets may be released several times eg. Hogwarts Castle, the Millenium Falcon and the Hogwarts Express.