That's a tough one. Don't know who I would recommend but I can tell you for sure it would NOT be alpha-technologies. Unless of course you like feeding scammy UK's your hard earned money so they can frolick about eating tea and crumpets with your money!
*Probably KnC would be your best bet provided you have the juice!
BTW, it isn't really profit until you've earned back the cost of the machine...which likely won't happen either
any thoughts on MH/s i should start at to see at least a few bitcoins at the end of the month?