I think these guys deserve a thread because they have pumped out 42 top quality acid tunes and hardly get noted for it.
Frank D Noise (aka Unix aka Dj Darkzone), Micheal Da Brain, and Ray Clarke (also known for his quality hard trance production on Hardware Files) are probably three of my top 5 producers.
The latest Brain '42 - Two hearts can beat as one' is intense 303 work, but I would have to say '3 - Acid Fly (robot mix)' is the most memorable Brain track. ;)