No offense meant at all, but I'd take them back.
If you like the Mordaunt Short's, you could take advantage of Richers price match system, and get them to match Peter Tyson's price on the 902i, which is £99.90 delivered. Richers should beat it by a fiver, giving you the MS speakers for £95.
They're a perfect front pair for 5.1, and you can easily buy the rest of the set. They do a centre at £120, and you could simply buy another pair of 902's for rear duties. Also, the sub from that range is a corker, and together they make a very good surround package indeed