I actually really like my Pelikan Souverän Stresemann M400, and it's very, very fine with its big B nib. However, yesterday, thanks to the powers of Lukas, I bought his M800, which is a slightly larger pen:

The ink above is Pilot's Iroshizuku Murasaki-Shikibu.

I love the length and the F nib that goes with it. I'm so used to my Platinum 3776 with its EF nib, which is - in Pelikan's world - something like a super-EF nib. The M800 is great to write with, and due to how the nib is designed, one can hold it upside-down to write with a lot thinner nib size. It's almost like having two pens in one.

When I press the nib, something really happens. It's a very sensitive pen, and it feels as though it'll work forever. Pressing hard onto paper results in more ink. No waste, no drool, and it's excellent on my non-feathering TWSBI paper.

Now, all I need is a Platinum Izumo Biwatame (Tan) Urushi Fountain Pen...