Glyn Barnes
I like my Roland Quadcapture. If you do need a more there is the Octa-capture
There is also a cheaper Duo Capture EX without digital ins/outs.
I can also vouch for the Quadcapture. I bought one for my laptop and have been extremely impressed. It has everything you could need, two analog ins/outs, plus two digital (S/PDIF in and out), and MIDI in/out. The inputs are combined 1/4"/XLR, and the first one can be set to either high or low impedance. There's a feature that can set your input levels automatically, which I really appreciate. I'm getting very low latency, even from my somewhat under-powered laptop.
On my primary DAW, I'm using the V-Studio 700, which is awesome, but to be honest...I could probably make do with the Quadcapture and hardly miss a beat (I wouldn't WANT to, mind you...but I could). ;)
Before my current system, I used an M-Audio Delta 66. This is a PCI card with breakout box, four analog ins/outs plus digital. From previous posters, it sounds like M-Audio might be lagging in driver development, which is a shame. But if they release Windows 8 drivers, I still wouldn't hesitate to recommend it. I got a LOT of mileage out of that card and it never let me down. Great quality, easy to work with. That said, I haven't tested it with my current system (Windows 7 x64, X2 Producer)...so maybe it's time has passed. I'm not sure. The thing is, you can find a used Delta 66 for next to nothing, so--assuming you find drivers--you don't have much to lose by giving it a shot.
I'd still recommend the Quadcapture, though, unless there's some compelling reason to avoid USB. If it's performance concerns, rest assured, your USB port is much faster than any audio you can throw at it (especially with only four ins/outs). And there's something to be said for getting your audio processing out of that big metal box.
~ Heather