I have the cage (third link above) and its great for them. They love it. You can actually find really nice new cages on e-mail. Big ones too, mine was 80 after shipping vs. the 115 on the website. I say your best bet is e-bay. Here is where I got my cage from (it arrived in under 5 days) http://stores.ebay.com/WPIC-PET-STORE
yes i do agree e-bay is a little cheaper on these cages, but they have raised their prices in the last year. i actually had that cage bookmarked but the auction ended so it didnt show anymore, so i couldnt quick link it for her. Some of the other sellers out there on e-bay have low prices but high shipping, watch out for that. thats why i looked other places for the same ones i found on e-bay.