Really depends on your i\o needs, budget, etc.
But here's an ex:
My desktop-main daw has an Echo Layla3G pci card with ext breakout box. It's fabulous-super drivers-plenty in's and outs.
My new laptop: I bought an external (of course) a Roland octacapture-works great also with Windows 7 and \or 8. It's USB.
I enjoy both but I love the fact that my USB Octacapture can go anywhere-with a full out DAW or a nice laptop.
Roland quad capture (less ins and outs gets nice reviews.
Echo Layla3G is still $500, Octacapture can be found for $550 or so and quadcapture for less than that. Way too many choices really.
I once did a search on audio interfaces and sound crds and hit many threads discussing this.