I'm offloading my Vypyr, but I'm a fan of the X Boost effect on it, just wondering which would be a better pedal to emulate this on my Bugera 333XL, I was looking at the EHX LPB1 and the Knockout Attack Equaliser.

Any thoughts?
I'll chime in, but keep in mind I don't actually know what x-boost is.
But I have heard it, and to my ears it sounds like a treble boost, with a little bit more mid than usual. Call it a boost with a slight low end cut.

I would try an EQ pedal.