I am going to throw my vote in for either a Focusrite Saffire or one of the interfaces from the Presonus Firestudio line. I have had great luck with both. I personally use a Saffire Pro 24 in my studio and a Pro 40 for my mobile recording rig. If you decided to get a firewire PCI card for your computer, make sure you get one with a Texas Instrument chipset in it. They work with pretty much everyone's interfaces.
Good luck.
Good luck.