Just set a budget what you are willing to spend and then list things that are must have features, like Bluetooth etc, and filter out what would be garnish, pretty sure you'll find what you need.
Also look for clearance deals, like this one
http://caraudiosecurity.com/kw-av60-6-1-detachable-touch-panel-monitor-with-dvd-cd-usb
Under £190, prolly cos a newer model is out