Hi Rinpoche there are a number of good servers on the market today. One of the brands that seems to have gained the most respect is Aurender. They have servers ranging for below $3K up to $17K. The higher end models are extremely flexible in I/O, and apprarently incredibly musical sound. One of the features that makes Aurender most interesting is that they incorporate a mass storage system... Some of the higher end models have a two-tier system... A very large HDD for storing your entire library, and a solid state drive where the devices moves material for playback... SSD is faster than HDD, and has negligible jitter.
For output to Aeris, you can use USB, or even better, SPDIF/coax if you select M10 or W20, which is the transfer mode which seems to be most used by the Rowland gang on their shows demos.
Have a look at the various Aurender product and list prices:
N100, M10, and W20 include the two-tier storage system. N100 has only USB output, while M10 and W20 have also SPDIF/coax.
Aurender has Canadian as well as US dealers... Including our mutual friend Angie of American Sound:
http://www.aurender.com/page/dealer-audiophile
But the answer is no... I do not have an Aurender server... I am still using my trusted Esoteric X-01 as a transport into Aeris... But... One of these days *Grins!*