100W RMS is pretty decent for the price, this is better suited for those who want to plug it into their tv but can't make full use of a 5.1 system. Price is £27.99, but if buying alone they will slap on an extra ~£13, so buy it with something else (or buy 2!). Also seem quite big, 54cm tall, so maybe better bass? Most of the reviews seem to be good, but take that with a pinch of salt as some websites delete bad reviews.
Delivery is £8.10 if you use the supersaver option (in all cases i've received the following day anyway on about six orders using supersaver)