Budget is around $1,000

There is a bike rack in the covered parking area. Of the bikes I already own I was initially thinking of using a steel frame Masi that has a Brooks saddle, 105 components that I use for a few 3-4 bike tours a year. I'm worried about it getting stolen. I read about using two good locks, maybe removing seat post via quick release to lessen the risk, but being new to bike commuting I'm still worried. If the bike was an older bike I may be less worried, but I love this bike. Hence I liked the idea of a foldie that I could stash in my office.

if I felt better about the rack area (not sure why I'm not comfortable) it would be a no-brainer, I'm probably over thinking it.