I'm picking up my first bully next week (

), I already have a crate for him that used to belong to my miniature schnauzer, I think it can hold him for a couple of months but I'm sure Ill have to get a bigger one soon; from what I've read, I believe I need a crate that is 36" deep, something like this:
http://www.amazon.com/Midwest-1636DD-Life-Stages-Folding-Double-Door/dp/B0002AT3M4/ref=sr_1_2/103-3194416-9291845?ie=UTF8&s=home-garden&qid=1176661907&sr=8-2 What brand/models do you guys recomend? My requirements are:
-It has to be metallic because it has better air circulation that the molded plastic ones.
-It must be portable (folds down) I think they all are, but just in case.
-It has to be good quality because I want it to last and be able to take the abuse that my bullie might deliver

.
-I like the dual door design like the one in the pic, it's not a must but it would be nice.
-Has to be available from Amazon.com.
I need to order it ASAP because I live in Venezuela and it will take an extra month to have delivered to my house from the US, believe it or not, it will cost me less money to get it from the US and import it than to get it from a local pet store.