Well I guess the option would be to get the Recon 3D and give this one to my dad, since he uses 2.1. So is the Recon 3D worth the price? I've read a lot of reviews on the Titanium saying it's overpriced and stuff like that.
based on reviews Recon3D is good for headphone gaming (better than X-Fi) but not so good for music listening, I think X-Fi is still the all-in-one best package.
if you are not interested on games you can go for Asus soundcards, Xonar DG or DS could be a good companion for the Logitech z506.
DG = 96Khz
DS = 192Khz
more Khz produces higher treble sounds and can be stressing.