USB Mic Preamps for Rode NT1-A Mic

I've had good luck with older M-Audio interfaces. These can be had for under $100 on the budget end. Just over $100 with bells and whistles. The one reviewed here costs around $140 on Amazon.

http://www.askaudiomag.com/articles/review-m-audio-m-track-plus-audio-and-midi-interface

I've been very happy with my Firestudio and absolutely love my Apogee Duet but it's pricey and only works on Macs. This is the one I'm looking to get next: Aphex IN2

Thanks for these.

I previously worked on a Macbook mic and the quality of audion was superb. My new PC's mic is nowhere near good enough. 

The options aboveseem to vary quite a bit in price and i obviously don't want to run  the risk buying something not good enough. 

I work from home in a very quite office and i'm now a little unsure on the main benefits of going for say the Aphex versus the M-Audio. Can either of you offer any advice on this?

I run my NT1A through a Behringer Xynyx1222USB mixer. It supplies the 48 volts needed and the necessary pre-amp. The mixer interfaces directly to my PC via USB.  I love the setup and the noise floor is below -60db.  I won't complicate things with details about the PC but I can tell you I am running Ubuntu Studio Linux 13.10 and record using Audacity.

I am using the RODE NT1A and the preamp I purchased is call CEntrance USB MicPortPro http://www.sweetwater.com/store/detail/MicPortPro/. It's very portable and has the 48volts to power the mic and is highly recommended by VO talent.