The packs I bought never sounded like the demos. I bought different packs from Choptones and Big Hair Profiles (CAE 3+, Soldano preamps)
Some of the rigs sounded either too bass-heavy or too thin. Then I experimented with different cabs - and got stuck with a cab from Choptones (Marshall 1987X). I use this cab for 90% of my rigs. For clean rigs I use a Kitty Hawk Cab, which I like best. I found them in a rig in the RE. Maybe you try to experiment with other cabs on your rigs?!