I only have a few boosts.
AC Boost, Jetter R2, OCD.
OCD does not change the feel of the amp much and does the added punchiness. The AC Boost loves other amps, but not this one as much. It sounds cool, just feels more metallic and compressed. The OCD almost makes it sound more open.
The low gain side of the R2 is a very subtle kick in the pants that brings out the feel of cranking it up very loud. High gain side gets kinda randy rhodes going. Works good on ch1 as well.
If you can try a Jetter R2 jump that thing. The 2 boost and dirt flavors are independent so it can give you a boost for ch1 and ch2, so it ends up like 5 gradual steps of gain.
OCD is everywhere and works well. A little cheaper, many less combinations.