I've been using the original JCAT USB PCie card with its own power supply, with the JCAT 2 into 1 USB cable for 3 years now. It feeds into my Antelope Platinum DAC (+Rubidium Clock) and the music is as good as you can get. I use HD-800 phones so I can hear all the music issues as I convert each.
I convert my own music to WAV 24/196 and use the JCAT setup to vet each recording before sending to my NAS storage. I have been considering changing to the Femto card but they are expensive. Heck all our gear is expensive!