Reply to Backup controller? What do you guys recommend?

So it's pretty simple. I absolutely adore having my 1200's and Serato. I really like the setup, it works great for me. It's what I continue to use in the club environment, and most of the time at home.

Honest fact is though? Sometimes I find myself wanting to play without prior planning to load up my gear . I have NO qualms about loading my 1200's into my car and bringing them out when I know there is something going on. If I know I'm going to need them for an event, or an afterparty. Or a house party. Or just about anything with a little prior notice.

But there are times just chilling with friends when it'd be nice to have something small and portable. A few times it would have been delightful to be able to spin, but there was a lack of gear . And I can't be expected to pack up the turntables every time for "just in case" really.

I'm looking to spend $500 or less, and probably will be doing a multi-payment plan through zzsounds.com or the like. I basically just want it as a backup, but I believe I'll probably get some good use out of it when I'm not at a place where gear is readily available.

Right now I'm torn between looking at the Novation Twitch, Xone DX, or the VCI-300.

What do you guys recommend? I want something that is ITCH compliant. Don't plan on buying/using Traktor, VDJ, anything else. I like Serato products, it's what I'm comfortable with and what my current playlists are based out of. I like the fact that Itch and SSL use the same lists. (Although honestly most of my playlists are smart playlists in itunes rather than crates).

I really liked the idea of the Xone DX, and remember them going on sale awhile back, but can't seem to find anything of the sort anymore.

Thoughts and suggestions? Twitch, Xone DX, and VCI-300 are the three that look to be in my budget range. Thoughts and personal preferences from what you have used?