We opted for this one due to its flexibility, ie its rechargeable so can be taken to friends whilst practicing and it's good for over 5 hours power on its battery alone without need to be plugged in.
Wireless connection is really useful and works faultlessly. In terms of size, it's not small but not huge either, it's a little over one stone in weight so easily carried about.
Built quality is great, it's very well out together and I could not ask for more.
The 40w amp means it has solid output, better than expected and the Bass is a stand out feature in it.
All in all its a super piece of kit and worth every penny spent.