Very happy to share with you that this is probably the best investment I've made so far.
Two weeks ago I ordered 10 BEAM 2U's from Advanced Mining Technologies. 11.000 ghs in total!
Everything was shipped within two days. Got my order in less than a week. Now I've been running the machines for a week.
I received instructions by mail. Managed to set everything up myself. There were no missing parts - screws, PSU, everything was on its place. The packaging was fine. The machines are solid.
Here's some info about one BEAM 2U:
hashrate: 200-214ghs per unit, gets up to 1100ghs per full set
power consumption: ~0.9J/gh
standard rack mount 2u server casing size, weights 7.2kgs
I wanted to wait and see how everything works. Been reading lots of sceptical posts, but I'm happy I placed an order with them.