I agree with adding ap sub for in ceiling. We built a house recently and did a pair of subs suspended under the floor with discrete grills hidden in a step.
For outdoor check out coastal source. Some good options that come with in ground sub. Great sound!
Just got one if these awesome JG singles from Dan at DGN guitars. If you have an HSH or HSS and need a single for Jerry tone these are the bomb! Dan builds amazing guitars as well.
DGN Custom Guitars - JGS Single Coil Pickup 2021 - Jerry Garcia Tone...