New Man Cave/Theater room setup I built.

I like your man cave. I give you a lot of credit for all the thought and effort that went into your creation!
Just remember it's not where you live or who your neighbors are but rather the low-life's that come browsing through. I'm glad you have a surveillance system and hopefully an additional homeowners insurance policy.
Enjoy...

My restless audiophile mind says "buy another shed and put it next to the first -twice the space!". What you have is totally cool -for now...

Very nice! Consider acoustic treatment on walls and ceiling; will give you a bigger improvement in sound quality than any component upgrade. "The room gives half (or more) of what you will hear".