I really love the nylabone collapsible crates
Here's a link to Amazon:
http://www.amazon.com/Nylabone-Cozytime-Pet-Home-C...
I've used them to potty train every puppy we've had.
I would definitely buy a new one, regardless of which one you choose.
I'd also be inclined to go with a neutral color in case you use it again with a different gender of puppy, kwim?