It's quite confusing because the Post-Mersh volumes don't work in chronological order. Vol. 1 has their first two full albums: The Punch Line (which is technically their first LP but is only 15 mins long) and What Makes a Man Start Fires? (their first "full-length" that actually approaches a half-hour of music). And Vol. 3 has most of the EPs (along w/ The Politics Of Time, which is a bit of a random hodge-podge).
Fair warning about their earliest stuff: it's even shorter and faster than Double Nickels. As in, most of the songs are under a minute. It's definitely an adjustment.
I'm not much of a fan of 3-Way Tie. Lots of covers, some of which are fun, but it's a little disjointed... also, longer songs, which is sort of shaky territory for the band.
This wasn't a very helpful answer, was it? Their discography isn't hugely accessible; you sorta have to just dive in to the earliest material, and in my view the pre-Nickels stuff outshines the post-Nickels stuff (as relatively meager as the latter is), so the Post-Mersh releases will come in handy but also be somewhat overwhelming and hard to find your way in. They are simply that kind of band!