Originally Posted by
tusphotog
Let's make this even more complicated than it needs to be. Even though the seat map shows a bathroom at 6ABC, it's entirely possible that you'll get a plane without a bathroom there. Some of the -900s have a mid-cabin lav, some have two closets. You won't know until you're onboard.
That being said, I'd still shoot for the bulkhead. Either way, it's a decent seat. I really like the -900s. I just wish I could fly on them more.
I didn't want to confuse matters by saying this, but you're correct. Regardless of the presence of the mid-cabin lavatory, it'll be a solid wall in front of row 6.