Well thanks so far. I just can't decide, I kind of need a collection of keyboards in my closet, all with different types of switches - after 3 weeks with white alps I maybe want Blacks or Browns or Blacks back. This forces me to have a rather big collection available all the time^^ That's also the reason why I'm reluctant to buy expensive keyboards. I have my MK-50 with browns and that's it, the rest are old cherries (G80-1000HDD vintage Blacks, G80-1000HFD vintage blues, G80-1800HFD blues), and the AEK2 of course, which I all got pretty cheap on eBay.
I took the browns on my MK-50 because the blacks are too stiff after a while, blues too clicky (slows down my typing somehow, with vintage blues however its okay, cause they don't click that hard by far). So, I don't need an extremely clicky switch for typing. Can be nice for gaming though. I'm also still waiting to test my first Model M buckling spring keyboard, hard to get them cheap...
Old ADB keyboard are actually just attractive, cause they are rather rare, especially on Windows 8 PCs if you know what I mean, and I want to add something more exotic to my collection (now that I have this adapter).