OK, I am looking for a good boost-type pedal for my set up. First, here's my signal chain:

1. Sun Face NKT
2. EVH Phase 90
3. [BOOST PEDAL NEEDED]
4. Blue Collar
5. Distortion Pro
6. Retro Sonic Chorus
7. Line 6 DL4
8. Holy Grail
9. VL Tremolo
10. Bassman LTD

Specifically, I'm looking for a boost pedal that would be good for all 3 of the following:

(a) I run the Bassman at a clean setting. As we know, a fuzz face into a clean amp is not the ultimate thing. So, I need a pedal that can be stacked with the Sun Face. The existing gain pedals I have (Blue Collar and DP-1) are set in such a way that the fuzz sounds too muddy when used in connection with them.

(b) I want a boost pedal that I can use to boost up the gain of the Blue Collar, without altering the BC's tone.

(c) I want a boost pedal that will give me a nice break-up sound on its own.

What do you suggest as a good pedal to meet all these needs? Is the Fulltone Fat Boost a good choice? What about the MJM RM Boost? Any others?

RD

RC Booster will meet those requirements.

RC Booster, and the Z Vex SHO would both be good choices.

Head

The Analogman KoT will do it too. You have the option of a pure (nearly) uncompressed clean boost or a boost with hair, you choose.

I think the Fulltone Fat Boost stays too clean, doesn't really have any breakup if I remember correctly. You might consider the Homebrew Germania, very cool pedal for boosting an already overdriven amp or adding a little bit of gain. My other suggestion is the Time Machine Boost, that one gets a lot of good reviews too.

all good suggestions...
also the Pharoah Class A boost, it has a tone knob and a dirt knob that is really good into another drive

ZVex SuperDuper 2 n 1! The master channel has become my sole source of OD and the boost channel is used for solos and bumping the Fuzz signal.

Keeley Fuzz Head
Lovepedal CoT 50
Lovepedal Balance