My standard reply to this question is to get a Pelikan M200 from a "nibmeister" such as Richard Binder or John Mottishaw. Nib width is, of course, a matter of personal preference but a safe place to start is F (fine). (Pelikan Fs tend to run more toward medium, anyway.) The advantage of ordering from a master nib restorer is that they test the nibs to ensure that they're free from problems like skipping or starving (where the ink stops flowing to the nib). They can also customize the flow of the pen anywhere from dry as bones to the proverbial fire hose. There are many gorgeous looking FPs out there, but you won't find any more reliable than a Pelikan, IMO. Fool-proof piston-fill mechanism, interchangeable nibs, large ink capacity -- all-around excellent writing instruments.
I keep an eye out on Richard Binders http://www.richardspens.com "Pen Show Tray". They sell out fast so click quickly on the first of the month.
I have quite a few fountain pens but my favorites are my Parker Vacumatics and Parker 51.
The good thing about Richards pen show tray is he has reconditioned them and tuned the nibs. A fountain pen tuned by a master makes all the difference.