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 some outdoor speakers acoustic energy extreme 5 http://www.acoustic-energy.co.uk/Default.aspx?pagename=Extreme-Series-specification 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 on top of a kitchen cabinet. It should have some form of auto-sensing power so it doesn't waste electricity when not in use. Budget is sub £100 Thanks!