Hi Cajun,
no, the ones I'm reffering to, don't have sounds, I think they just have an audio interface. They're more expensive than a midi controller, but not as expensive as Novation which do have sounds. Novation's not what I'm after as I'm also happy using soundfonts.
I get 10ms latency with the new laptop, but with the audiophile usb soundcard ( with asio driver), I managed to get it down to 2.9ms. I'm hoping that a midi/audio controller keyboard will give me similar latency, without having to use 2 seperate pieces of equipment.

best wishes
Rikki

ps don't know what sort of soundfonts you're collecting, but I've managed to get some quite interesting ones thru a company called Soundbrewer. They've done some of the old synths like M1's, Matrix 6 etc not terribly expensive either.