I came really close to buying that pedal, but went with the plextortion instead. I chose the plext instead because its a bit crunchier and more suited to my "head tone". My zvex distortron covers alot of the same ground as the pinnacle sonically..warmer, browner. That said, Im looking to replace the distortron, which I love, with the wampler plexi drive. As good as the Zvex is, the wampler stuff is a sizeable step up.
Well the PLEXT can get pretty brown and modded plexi ish in vintage mode too. But the pinnacleis def more brown and early EVH. Thicker. Chewy.
The PLEXT is a bit more crunchy, brighter, and tighter. Think NMV Metalface, JMP 2203/4, 800 2203/2204/2205.
The Brownie is very much in the EVH Brown Sound ballpark. It's bright, aggressive, and not overly gainy. I think it's great for that modded Marshall sound, not sure how much gain you're really looking for.
The Cmatmods Brownie is pretty darn impressive!
For high dollar, the Brownie, Pinnacle, and Suhr Riot are all good contenders.
For low dollars, the Joyo US Dream, Marshall Gov'nor II, or MXR 78 would be good choices.
Have you considered a Rat type pedal? I've got a Landgraff Mo'D which is a fantastic take on a rat. Out of your price range, I'm sure (at 400, I think it's out of 99% of SDUGF's price range) but maybe you should look into the Cmatmods Ratified?