When the phenolic tip first became available, I jumped on the bandwagon, but soon realized that with the use of phenolic, you sacrificed a fair amount of control over your break, at least I did.
I've not tried a Samsara yet but advocate any leather tip over phenolic.
I generally replace phenolic with Super Pros.
I replaced a friends tip on his BK with a Talisman break tip and hes sold on it. The only problem with the Talisman break tip is that they are not readily available. You have to buy at least a package of 3 Talisman regular tips and Tony throws in a break tip as a bonus.
And how are the Samsara's for jumping, I may have to order a couple.
Will try Mad Mans tips too as the price is certainly right.