New DAC, or new amp?


I've got that upgrade itch. I am trying to smoothe out the sound, and get rid of some grain. I am trying to keep the spending to around $1000. I have an NAD integrated, being fed by Cambridge audio Azur 640C cdp going through a musical fidelity tube buffer. SOnus Faber COncerto speakers, and a rel sub. Cardas Cross cabling throughout. My question is what to upgrade to accomplish this goal and stay withing budget. I was thinking of ading a new DAC (MF Trivista 21). Or, should I really upgrade the integrated. Imaging could stand to be better too. Alright guys and gals.....lets hear those ideas!
phoenix469
If you like the MF sound, try auditioning the A5 integrated in your setup! I think it would play great with your Sonus Fabers, and it should be a big upgrade overall. The tube buffer could be a source of grain too, does it really improve your sound?
I was playing with the tube buffer last night. With A/B comparisons, I found that the tube buffer makes the sound "blurry" Imaging seems better, but a little high end clarity is given up. I will probably sell the tube buffer. However, I wanted to stay away from a tube integrated. I don't like the idea of having to replace tubes, and I don't want the plethora of options by switching out tubes. I'm a real less is more type of person. Thanks.
I was thinking of buying a MF x-PSU and Xdac to augment my tube buffer and hopefully make my source a little better.
Or would I be better off upgrading the amp?