Good to hear that way is working for you! I'm using the hd500x and JTV guitar (alternate dream rig) so the EQ modes on the L3T are important for me, electric setting for electric and acoustic setting for acoustic. Those modes really bring out the character of the amp/acoustic sims in a live setting. While the RP1000 can't change those modes automatically, I think they would still benefit anything plugged into it. And you lose that ability going into the mixer first.
There's nothing worse than a guitarist arms race tho! You'll win by the way, 1400 watts will rattle the fillings out of your teeth!