A decent sale on the Salomon website for X Ultra 4s matching the sale last December.
As per advice from the last deal, make sure you go up half a size as these are snug. Or if you've got the time, try them out in a store like Kathmandu first before buying online.
I have these and really like them. Insoles are a bit thin though, so if you plan to do long hikes with a heavy pack replace them with Superfeet insoles and your feet will thank you.