Sorry, can't sleep, been thinking about how I'm going to solve my problems.

Water under door leakage problem: Solution: Hire experienced mason to brick up to height of concrete wall (about 4 foot), then apply some sort of stop leak goo (if it exists) to outside of wall. Then fill outside stairway with dirt.

Front speakers. Put 3 in-cabinet M80s in wall behind screen. Build a box surrounding them on the back-side, in garage. The height of box should be higher than my car hood, so no problem parking car in garage. Pad box with insulation and leave studs exposed behind screen to allow warm air to circulate to keep speakers from freezing.

I've located an unused 36 inch wide solid wood door for $35, to use for HT entry door. Just have to get a friend with truck to get it for me.