Shark SS and Supermax both very cheap and very smooth, sharp performers for me.
You can buy 600 Supermax for £14 delivered on the bay!
I am very tempted sometimes, but I have about 1,300 blades and have barely touched my Supermax (only used about 10 as I am a blade wh*re - constantly flitting between them. But obviously not being paid for it; that similie is over now)