Been a user of WE since the closed bolt era, but i'm now swapping to TM as I don't have to stick with a single, shit aftermarket option (note, not upgrade, aftermarket, as they're anything but upgrades).
Also another consideration, WE V2 (what most retailers in the UK have in stock at the moment, and what all used sales will be) is now end of life, as V3 has been released 4-5 months ago. There isn't enough information on the reliability of V3 to be able to recommend them, and V2 parts ceased being manufactured 3 months prior to the first production runs of V3, so parts will start to become more scarce.