There are also Cartier and Montblanc fountain pens in the size range you're looking for. I especially like the Cartier because it is slim as well as short.
The price, however, is quite chunky. I'm admiring that one from afar for the time being.
There are lots of good ballpoint pens in that size range. I detest ballpoints, but discovered that there's a Parker gel refill in the same form factor as the Parker ballpoint. Not quite as nice as a fountain pen, but not bad.
It's funny that the same people who get bent out of shape over $200 pens think nothing of spending many times that on computers and other gadgets that will be obsolete in two years. I've written nearly a million words with one of my Watermans, dropped it more than once, and wrecked the nib. Got it back good as new under Waterman's lifetime guarantee, and am looking forward to the next million words.
For what it's worth, there are noticeable differences among fountain pens. Gold, platinum, and steel nibs all feel slightly different. If you use one for more than writing checks, the balance matters a lot, too. However, the superexpensive ones (say, over $400 or so) tend to make really lousy writing instruments. They've sacrificed balance and writing comfort in the interests of conspicuous display: someone who spends $400 or more on a pen wants everyone to know it. For serious writing, I like the plain lacquer finishes in the $50 to $150 range. I use a gold nib, but that's a matter of personal preference.
Katherine
I have had the opportunity to write with some quality pens. I'm happy with my Pilot V5 and a mechanical pencil. Pens have a way of disappearing where I work. People love my V5s.