I'm looking for advice on an inexpensive stereo amplifier to purchase for use with an Airport Express. This is for my kitchen. I have ceiling-mounted speakers (nothing special), but no current audio source. This doesn't need to be super-high quality nor very high in power. It doesn't need to do anything other than be an amp. Ideally the amp should be small and run cool, as it'll be at the back of a kitchen cabinet. It should have some form of auto-sensing power so it doesn't waste electricity when not in use. I'd like it be under $100, preferably under $75. Thanks!