Mac sound card with USB > SPDIF and allows volume control

[NakkiNyan]

A fatal flaw in OSX for me is the loss of volume control when using SPDIF, yes I know the theoretical reasons but I simply don' t care enough at the volume I run it at.  I am "stuck", not sure if this is good or bad though the audio is nice, with only SPDIF in on my soundbar so I absolutely need it.  
 
I am thinking a USB soundcard (since USB normally allows volume control) would be my best choice.  The 2 things I need:
1: Allow volume control even when using SPDIF on the soundcard (the entire point)
2: Cheap since I really don't "need" this.
 
Sabrent USB-SND8 8-Channel 3D USB 2.0 External 7.1 Surround Sound Box
--and-- 
Diamond External Xtreme Sound 7.1-Channel USB Audio Device
 
Before someone mentions Soundflower, it works but lags when changing volume and distorts audio in OSX 10.9.x, it didn't do either in 10.6.x - 10.8.x except at extreme volumes (Movies with DTS/FLAC/AAC 5.1 audio) where I was simply bypassing soundflower any way.

 

[Currawong]

Do you need 7.1?
 
You need to check with each individual USB sound card, as whether or not they can have their volume controlled by the computer depends on how they are set up.

 

[NakkiNyan]

Removed since I thought I hit preview instead of submit ><

 

[NakkiNyan]

I don't need 7.1, I only have 5.1.  They just looked like good choices for the price.
 
I would actually love TC-Electronic Level Pilot but it is XLR, in and out, not optical (search for it since I am not allowed to post more links yet) so I will try for OS level control instead of hardware.  3.5mm would be nice too for my AKG headphones but I won't be too picky.  As for looking up each, most people are using them as a DAC not SPDIF so it works fine for them.  Creative was direct with me but neither of these companies seem to bother responding to question in a timely fashion so I thought I would ask some audiophiles which are likely to use them than Amazon or NewEgg users.