KC Tool has been the place to go for Wiha since they opened for business.
They've taken on wera, felo, gedore and hazet since their humble beginnings as a Knipex and Wiha dealer. Seriously great business.
Hate to be the know-it-all, but Wiha USA (which also applies to participating dealers such as KCTOOL) usually rotates a selection of hundreds of items on sale for six months or so at a time (recently, some products were on sale for a year...or maybe longer). They had over 300 products on sale up until April 1st (some at 50% off list). I'm patiently waiting for the next batch, hoping that the measuring instruments go on sale again.
I'm pretty much exclusively Wiha on bits, screwdrivers, l-keys and t-handles.
The quality and price ratio can't be beat (unless you're paying list).