Thought I'd hit an answer when I discovered that Windows Media Player 12 has support for network players (I'm on WMP11) but then, annoyingly, found that WMP is only for Windows 7 or 8 (and I'm on Vista )
Now it's entirely possible that WMP12 might be no better as a streaming controller than iTunes is, but unless I can find an alternative media player that is, then an upgrade to Windows 7 seems to be my next port of call
So, is it possible/easy to move from Vista to 7 (as an upgrade rather than a fresh install) and where can I get it at a non-bank breaking price?!