But then you're stuck with Creative drivers. Nope. I've had Creative cards. Never again.
I've had the original STX for about 6 years. I also have an Mayflower O2/ODAC Rev. B. The headphone amp on the STX is every bit as good and is actually more powerful than the O2. It's just a little bright vs the true neutrality of the O2. It's certainly 'audiophile' grade.
My ZxR was installed on a maximus vii hero with windows 7 64bit, then moved to a Maximus X Hero with windows 10 have had the card for about 3.5 years with no issues at all with it.
I have a Creative Sound BalsterX G5 7.1 on an Asus rampage 3 extreme board Win 7, and i have a Zx installed on a Asus maximus Gene z Z68 board Win 7 without issues. Both of these are a little over a year old now. Have downloaded drivers from Creative and also used the creative software to updated drivers and haven't had issues.
I will admit the mid 2000's and older cards the drivers did suck.