Opinions on my 1300 sq ft floorplan?

Hey guys, I sent this as an email to John, but figured I could get some other opinions on this great forum as well! First I'll explain a little about myself. My name is John Conway, and I play keyboards in a touring rock band. We are taking time off to write and record a new album and there happens to be an empty, 95% built 2-story building that I can take over to build a rehearsal/recording space. The building is located on my family ranch in Arroyo Grande California. It is isolated from anybody else, so actual "soundproofing" is not an issue. The building is made with the straw bail form sprayed with shotcrete technique so the walls are at least 2-3 feet thick. Originally intended by the previous owner to house an art gallery upstairs and a classic car collection on the ground level I will be using the lower portion for the studio and the upstairs as the lounge/office. The floor is concrete slab, and the interior dimensions are 46x29x10 feet. On the shorter walls, which I will call N and S there are giant iron saloon style garage doors. On the west wall, biased slightly toward the south, is a spiral staircase with a diameter of roughly six feet. Currently there is no ceiling and only a plywood floor above that. Currently the building is not wired for power, and they began to run plumbing on the south side of the east wall but it is not completed. I figure it would be smartest to run outlets etc. the same time we are putting up walls. Same would be true for ventilation, which there is currently none of. There are also no windows on the ground floor. Use; Obviously this will be intended for recording, but it will be used as rehearsal space as well. It is important to have a live room big enough for a 5 piece band to perform in, as well as to be in the control room listening to mixes. I also have a large number of synths and keyboards, most of which I like having in arms reach of the control room console. Having an iso booth big enough to hold drums or a selection of guitar amps would be nice. I don't think i need more than one though as make shift vocal or amp booths could be created elsewhere. I am also very fond of open and airy workspaces, and like the idea of sliding glass doors between the control and live rooms. How do these do for soundproofing? storage is also important, as our gear will have to easily load in and out and store a lot of road cases etc. this storage spot might also be a cool place to record some novel sounding things. In the end, I would like to be able to patch a mic into any room, including upstairs. I have attached a sketch I did on Floorplanner.com for you to reference.

hi! It's a great design!!!! just a thought.. why not flipping the CR so you have visual from mixing position on the big live space?

Thanks for the reply. Yeah, I would like to have a better view of the live room, but i can't seem to fit it around that staircase without wasting a bunch of space. It would also be nice to have access behind the front of the CR to wire speakers and patchbays etc.

OK, here is round 2! I have decided I do not need storage or a bathroom on the first floor as they can be put upstairs. I would like to maximize the live room space and also have a second space for editing/MIDI work while the control room is tracking. I also think this design has better sightlines etc. Any comments would be helpful! -John