DAC upgrade?


Hello, I was hoping to get some insight and opinions on upgrading my DAC. I currently am using a Rotel A14 integrated amp and am using the internal DAC of the Rotel. I can't seem to find any specifics regarding the DAC other than its anĀ 

AKM 32-bit/ 768kHz Digital to Analog Converter. The amplifier is powering a pair of Totem Staff speakers and do most of my listening with digital lossless media (ALAC, FLAC) output from a Mac mini and using Audirvana.

I certainly do not consider myself an audiophile but I do enjoy good sounding music. Do you think upgrading my DAC would be beneficial? I wasn't wanting to spend too much on a DAC but was wondering if something like the Schiit Modi multibit, Topping D50 or comparable would provide a better/different sound?


Thanks in advance and look forward to your comments.

downingp
I have been playing around with the settings within Audirvana and am currently up sampling to frequencies around 384 kHz. In a sense, is that producing a better sound?
Have you tried the system optimizer within Audirvana?
For sure wakes up my Cary Xciter DAC.
Got nothing to lose by flipping a switch.
Now I am going to have to investigate... never heard of extreme.
Oh yea I use the optical interface between my mini and the dac.
I think, at this point anyway, I am leaning towards either the Topping D90 MQA or the Gustard A18.