I was thinking of getting the Ds-1 Ultra by Robert Keleey or the Treble Booster. Has anyone tried both of them and tell me if i should get both or only one of them will suffice.

I have:

Laney VC50
Mexican Standard Strat (Upgraded Fender Lace Sensor Pickups; Blue,Silver,Red)
ISP Decimator
Robert Keleey Mt-2
The Keeley mods are generally considered pretty expensive for what they are. There are schematics around online for all different mods to the DS-1 and it's not expensive or difficult to swap a transistor and a couple of capacitors.