Yeah, if just for capture, any OS/DAW should work just fine if the laptop can do it. As long as you can export/import the audio afterward to Sonar, then you're good. However, I'd keep it as native as possible.
I still sometimes use my trusty old Yamaha AW4416, which still works perfectly to record live performances. It has the horsepower to 48Khz/24-bit, and has never dropped a bit since I bought it in 1999. Exporting isn't that easy, but importing to Sonar using a free AW4416 CD-extract/read tool is a snap. My only wish was that the SCSI CD-Burner and the Yamaha could burn a backup CD faster than 6x.