There are numerous streamers/music servers that come with brand specific software, many that use brand agnostic software. Many can be controlled via computer interface. First question is budget? 2nd - What type of digital inputs does the Accuphase support? 3rd - Do you want the ability to have your current cd collection ripped to hard drive, and if so, do you want that to be accessible via a network connection or via a built in hard drive to your streamer?
Lots of suggestions, none of them are wrong; however, to answer your question fully, I would say you need to provide a bit more detail.
What is your comfort level with computers and networking? Wifi or wired? Cool thing about streaming is you can go from one box solution(especially since you have a dac you like) to multi component with prices from sub 1k USD TO 25K +