Have you tried the Spotify music service?
(I have no connection with Spotify, other than enjoying the ease of use and incredible selection of music.)
http://www.spotify.com/uk/
Spotify is available in seven countries, there's a free option, but you can also buy a premium service.
With the latter, you get a 320kbps stream of music - and I've found it quite enjoyable to go on long musical discoveries with the service. Think iTunes, but without having to store the music on your own computer. The free versions have commercials interrupting playback, but the Premium service is without ads.
Now there's an app that will help you control your Spotify playback with different mobile phones or iPod Touch, and that will also let you search for music - the search function is extremely responsive. If I enter Loussier, I get a lot of the Jacques Loussier Trio recordings, instantly available for playback, at the press of a button.
If you have a computer connected to the internet and to your sound system, then I recommend giving the free version of Spotify a spin.
Remoteless is an app that will run on a number of different mobile phones, and which is Windows and Mac compatible. The Mac version was released just a few weeks ago, and I've been trying it out. Extremely happy with the result - I have a very stable internet connection, and am not experiencing any drop-outs or difficulties. The app just runs. It can start Spotify if the application is closed, and it can help me access playlists, search for music and control playback.
The app is still in development, but is already where I find it extremely convenient to use.
http://remoteless.no/
I haven't tried the Windows version, but as I understand it, that's been in development longer than the Mac version, and it runs perfectly. The Mac version did a good job for me.
Note that there's a special page for the Mac version, and follow the installation instructions. For what the app costs, it's a hundredfold return on investment as far as convenience in playback - that, combined with Spotify, has sent me on some serious musical discoveries lately.