Gosh - I am so envious of y'all that actually have a room for sewing! When I bought my house ~16 years ago I bought one with one more bedroom than I really needed just for that purpose but God blessed me with the raising of my grandson so there went "my" space! I've tried arranging a sewing space throughout my fairly small house and am currently sharing my bedroom with my sewing/crafts with my stash housed in the backyard shed in plastic boxes. I'm single so that helps, dunno if a dh would care too much for the clutter which is about to drive me nuts.
I'm with the others here...use both! I sure would! You (and dh) can make some cute wood frame or pvc pipe/fabric room dividers to make your "hall". I Googled some instructions for my son one time and there were a lot of designs that popped up.