Not really - its fine at 25lbs and the X0's only save 70g over the stock S1400 any way. The chainset was only bought as i'd stuck a snipe on it, and then forgot about it, but ended up winning it for just under my snipe (how most of my upgrades seem to go).
If weight were a problem i'd change the wheels 1st, they're nice and stiff thanks to the 15mm front and 12mm bolt through rear, but heavy(ish) at 1850g - there not many other places to save weight without applying for a small mortgage. This coupled with the fact i'd like to try one of those new fangled 'dropper' posts, which will help it gain a pound or so means i wont be going down the weight weenie route on this one.