I tried a Scott Spark (think it was the 20 or 30) at the Glentress Bike demo day a few weekends ago and loved it. The Spark 30 won a test of marathon bikes in May's What Mountain Bike.
I looked at one over at Evans at Gateshead, very light and good looking bike. I'm also trying to save up to upgrade to one from my Scott FX. If you do buy one let me know it is.