Advice for a usb dac

I would like to jump into PC Audio and looking for advice regarding a Dac (entry level). The components of my system are: Maggie Mg 12, Odyssey Stratos, Classe CP 35, Rotel cdp 991. I am thinking about the AudioQuest Dragonfly v1.2 OR the Cambridge Dac Magic 100. I don't want to invest to much for now. Not even sure about my setup: my pc is 25 feet away from my system, so I will have to use a long cable. Any advice or other suggestion/recommendation?
ALO The Key DAC for nearly the same money as DFly. This space of cheap DACs is getting more and more populated though, so you may find better values. It is hard to keep track nowadays
If you like the Dragonfly concept then you should check out the Sabre based DAc's at

There's even one that works with an Android phone (and it sounds damn fine indeed).

I have Schiit Modi USB dac for sale if you want let me know
How are you going to ‘jump in’? Streaming, cd rips, hirez downloads? Makes a difference as to your requirements. If not sure, as a starter I would stick to one of the under $200 USB only DACs. The AQD at $149 certainly fits.
Along the lines of Mesch's question too. I suggest you look into iFi Nano DSD. Has the added benefit of driving headphones so can be used on the go. I use it in that fashion.
Take a look at the Schiit Bifrost - they have a nice UBER analogue upgrade that takes it to the next level of performance - when you are ready.

Installation of their upgrades is a breeze - simply push into the connector strip and screw in place - if you can install computer cards, you can upgrade Schiit gear - it's that well designed

I have one in my audio system - when you treat it to good IC's and power cables the performance improvement is amazing.
- my cables now cost twice as much as the Bifrost
- it just kept getting better :-)

The new Gen 2 USB port provides exceptional details and pinpoint imaging.

This DAC will grow with your requirements - to extremely high performance levels

I had the DacMagic with a tricked out power supply - the Bifrost trounced it!

Schiit are very quick at processing your order - and with the shipping option I selected it arrived in Canada in 4 days - excellent service