This HP iPAQ H4150 is one of the best because of its price and functions included. Some more expensive handhelds don't have all these types of connections: Bluetooth, Infrared, Wifi. I've checked 8 to battery life... but it really depends on use. Battery life is much longer when using as reminder or sth like that.. so don't expect same battery life when used as player ;)) Design is perfect, small, nice. There's also SD/MMC slot.

HP iPAQ H4150 - Pound for pound this must be the best value PDA on the market. It has bluetooth, WiFi, IrDa and comes with a cradle & carry case. I teamed mine up with a Tomtom GPS system. Don't know how I ever managed without Sat Nav all these years!