What's wrong with the cycloops? That's the best one we had in when I worked at SC for DJ use anyway - but I know you can't store samples in it which is a big downside - if they made one with a memory card or something it would be classs. Is it just one shots or loops? Are you wanting to trigger them live or have samples sequenced alongside the tracks your mixing? If you're wanting it to sequence or trigger it for you then your best bet I would say would be to use somehting like the sp303, or es1, but you'll probably have to keep manually changing the bpm to make sure it stays in time. Problem with most of the one's like the sp303, or the es1 (korg) is that the bpm sync engines in them are usually pretty shit if they even have one. Don't know of anything else but there may be something new out there
Cycloops though is made by Peavey under there Dj "Big" DJ brand, used to be made by Redsound. Best DJ sampler bar none!