Tough choices! I can see the real appeal of cloaking technology, and I would also want the latest in Starfleet luxuries.
One thing that I'd want is a safer bridge design. Something that still looks 'Federation', but with, you know, less sofas, less people standing up and zero sharp edges to smack your head off. Which got me thinking, maybe some technology to limit the effects of the console blow outs.
From the list though, I'd probably go with cloaking.