I need more Power Scotty !!!!

The one thing to NOT expect from ls50s is to go really loud with them (which of course requires more power).

Using a sound meter app, I find I seldom go louder than 88 db SPL which is about the level of an automobile engine. Not that they can’t go louder, but they are small (though well built) so are not as good at going loud and clear as similar larger speakers can. Maybe with an active crossover applied to offload some work to a sub. But little speakers always will hit a practical point at which there is diminishing returns going louder.

I compare that to my much bigger Ohm F5 series 3 speakers off same amp (500w/ch) in the next room. THose gladly go up to subway or diesel truck level SPLS ie 100 db range.  Looks like ~ a dozen ls50s would fit in one of those.

Warning: once you get past mid 80s SPL for more than brief peaks, you are likely causing damage to your ears and hearing no matter what, so beware.....

I have both ls50s and ls 50 metas.

Having driven ls50s with various amps I'll go out on a limb and say your Outlaw receiver has plenty of power for those.

So question is what is it you are looking for in terms of sound when you say you want more power?

Also how big is the room, how far back are you when listening, and how loud are you wanting to go?

In any case, ls50s are small and ALWAYS benefit from adding a powered sub or two to fill in the missing lowest octave.   That's the next thing I would look into were I you.