I am in the same boat on thinking of buying a cab pack but I dont wanna go dropping money down that rabbit hole. After having our second child money is much tighter. $25 isnt so bad but $25 + $25 then $70 or so here and $15 on OH etc can get A lil pricey. So, what I'm looking for is a great IR for pretty much 85-90% of my uses. As is I use the same IR for all of my live presets because if I were mic'd it would all be the same cab.
Clark posted a 7/8/9 clip about a month ago, I remember thinking that cab 9 seemed to have more depth/dimensionality to it. I am leaning towards that one but not sure. FWIW I my original music is modern and I would normally say "give me that most ferocious and low thumping IR/cab you got" but since getting the Axe and getting more serious in my home studio I have learned that great guitars in the mix are very often not what we'd think they'd be or what we want to hear solo'd.