My current Do Want list include the following:
Visconti Homo Sapien. I have not decided if I would like the Bronze of the Steel Age better. My inclination is towards Steel largely because the Bronze is an oversized pen. While I have giant man hands, I don't think I'd be comfortable writing with oversized pens. But if I can give it a try, I'd like to test both of them.
Pilot Vanishing Point. I am intrigued about these pens and I would LOVE to love these designs but they're all so incrediably boring. The metallic colored ones just look cheap to me, maybe it's the photos though. The only ones that I really like are the two Raden pens and the 50th anniversary wooden version seen here.
Otherwise, I've pretty much have most of my current 'must have pens'.
I am, however, also considering the Visconti Merry Go Round. It's way cheaper than the homo sapien as it's built off of their Rembrandt line and money gets donated to a children's hospital in Italy for every pen sold. It's being marketed as a 'child's first Visconti'.
There's still a couple pens on my 'would be nice to have' list, largely a vintage Mont Blanc and a vintage Waterman and/or Scheaffer. I own a vintage Parker Vacumatic (that I need to get some nib work done on) and a vintage Wahl-Eversharp, so there's no BURNING NEED for another vintage pen really. But would love to get a few more gold nibbed pens. Right now only the two vintage pens and my Platinum are gold nibbed.