Elizabeth,
I struggled with this same question last year. (I have a bachelor's--worked in the professional world for about 10 years--and figured out I wanted to be a nurse.)
I decided to go with the masters degree (just got accepted

) because my goal is to be a nurse manager and there seems to be a lot of leadership training in the masters programs. Plus, since I've worked in healthcare admin, I have a vague notion of what specialties in nursing interest me (ICU, med/surg) and which ones don't (psych, ob/gyn). Also, I want the option to go on for a doctorate when I get some years of experience under my belt.
I know the direct-entry program is perhaps going to be more expensive and life-consuming than an accelerated bachelor's. But I'll be an RN in about a year and able to work (and get experience) part-time as I finish up my master's. This works for where I'm at in my life right now.
Good luck!