newbie DAC question


Hello!

I broke into the HiFi world about two years ago and l would love to know if a DAC would improve my system in a way that's worth my while. I currently have the following setup:

- Elac Debut B6s
- Music Hall A15.2 integrated
- Onkyo C7030 CD player
- Sextet and Bel interconnnects borrowed from a buddy
- Speakers are on stands carefully placed where they work best with the carpeted room.

I've read good reviews on the Musical Fidelity V90DAC and several Schiit models, but I can't determine, based on any literature out there, if my setup is at a level that would make a DAC worthwhile (or even noticeable). If it WOULD make a difference, does anyone have any suggestions for coaxial or optical interconnnects to go along with it?

Thank you much!
kremrik
@yage thanks! And by sources do you mean CD player? Or do you mean it'll improve with the addition of the DAC on top of the CDP?

@jburidan they should be, I've had them for over a month and they have gotten several hours a day of play time. But I got the B6's off of Amazon actually :)
And I apologize for any ignorance/confusion relating to this topic, DAC's are very far out of my comfort zone... 
You could purchase the V-90 from Music Direct and the Bitfrost from Schiit and try them out. Both have return policy. Ask each vender as to their thoughts regarding the improvement over your CD player’s DAC. I would use a Coax digital cable.  

@mesch that's a great idea. And I will most certainly ask them about the potential improvement. Do you have any coax cable recommendations? I've been eying up Blue Jeans Cables tentatively.

Thanks!