Tweekend Advance by The Crystal Method.
Proper kick-bottom electronica, with awesome production quality- fantastic test disc (as anything by T.C.M seems to be...), with deep, solid basslines, fat funky beats and plenty of (never harsh) sparkly top end.
If you like your dance music, check these guys out and I guarantee you won't be disappointed. I've had one of their albums permanently residing in my CD player for about a month now...
It has taken the mantle from Talvin Singh's 'Ha' -incidentally, track 9 (Sea Breeze), has one of the most messed-up, frantic beats and bassline you're likely to hear. If your system makes a good fist of this track then you've cracked it- I've heard this tune absolutely mangled by expensive, otherwise fine-sounding kit. Any hint of slowness or drag in the low registers and you've had it. I reckon What HiFi should test every piece of kit using this track, I've heard nothing like it!