I have a 12 foot Werner step ladder that's great. I also bought the bucket that connects to the top of the ladder for holding stuff that I also really like. It works on all Werner step ladders. The 12 foot is my heaviest ladder and the one I always hate dragging around on jobs. It's very useful, but the weight is something to consider.
I've never tried to carry or set up a 14 foot step ladder. I didn't know they existed. My guess is that it's going to be even heavier, and harder to set up.
How often will you use it? I rented 12 foot ladders for a few jobs before buying. Turned out to be something I use half a dozen times a year. Some years I use it every day for weeks at a time.
I almost bought a Little Giant ladder after watching an infomercial on it that impressed me. But then posted a question about it on here and got mixed reviews. Some people love it, others find it too heavy to deal with and always use another ladder instead. The cost was also a factor. It's heavy AND EXPENSIVE!!!!! I looked into the copy of it at Lowes, which was about half what they wanted for it on the infomercial, and didn't care for it.
I have two extension ladders, 20 and 24 feet. I have 6 step ladders, 4, 6, 7, two 8 foot and the 12 foot. I've had days where every one of them where set up and I went from ladder to ladder. I have to folding step stools. 2 step and 3 step. I use the 3 step folding step stool more then anything else. It stays in my truck all the time. It's a must have for me.