FWIW, I have Windows-based laptops made by Sager and by Asus, and I previously owned another Sager. All of them have been very reliable (the first Sager failed after 6 years of heavy use), and I've been very pleased with their performance (running Windows XP; you'll want to go with Windows 7 if you choose a Windows-based pc).
Most of the Sager models are overkill for your purposes, but you might want to check out some of their less expensive models (around $700 plus options). All of them provide a SPDIF output, which might result in better sound quality through your DAC than using USB would (particularly if you might ever want to play back uncompressed music files, as opposed to internet radio).
Powernotebooks.com is probably the leading Sager dealer, and is exceptionally good to deal with, as you can see by checking out their ratings at Resellerratings.com.
I have insufficient experience with Macs to be able to comment on them.
Regards,
-- Al
Most of the Sager models are overkill for your purposes, but you might want to check out some of their less expensive models (around $700 plus options). All of them provide a SPDIF output, which might result in better sound quality through your DAC than using USB would (particularly if you might ever want to play back uncompressed music files, as opposed to internet radio).
Powernotebooks.com is probably the leading Sager dealer, and is exceptionally good to deal with, as you can see by checking out their ratings at Resellerratings.com.
I have insufficient experience with Macs to be able to comment on them.
Regards,
-- Al