My Stillare V1 can throw some pretty damn respectable clouds. The Mutation X is nice, but the V2 is about to come out with what looks like more functionality for about $5 more so I'd wait on that. The Doge also looks really nice.
The TOBH is decent, but if you want a real cloud machine (like contest worthy) you'll need to modify it a bit. The Mutation X is basically a TOBH with the AFC tabs cut off and more holes drilled.
All of these should take a Chuff Enuff top, so grab one of those too.
And remember that no matter what you buy, it'll be pretty much obsolete in a couple months. RBAs cycle faster than electronics nowadays.