Posted, the 200/400 and 600 are light and nimble pens.
The standard sized 200 is a slightly cheaper body than a standard sized 400, with a much different nib. It is not quite so butter smooth, but is not a semi-nail like a 400/600. It is a nice springy regular flex, called 'Soft' in Japanese pens. It has a different tipping geometry more teardrop than the round double ball of the other Pelikan...400-600-800-1000.
The medium-large 600 has many pretty pens, even if some are lightly used, very many beautiful pens. It like the modern 400 is a semi-nail. It has a thicker girth. All three the 200/400 and 600 have great balance.
The Large 800 is a nail. (Don't have any if so, then the W.Germany or up to '97 regular flex. I don't chase nails.)
The oversized 1000 is now regular flex.....older Bock made nibs are semi-flex. It is not quite as large as I thought, though a big pen.
I prefer the 200's regular flex nib. A good comfortable ride, 1/2 a width narrower like vintage or semi-vintage nibs, and has a clean line. Almost 'butter smooth'. Very good and smooth. If you order nibs from England you can get them much cheaper than the States or even Germany.
For @ $90 you can get a 200, and the gold plated nibs in England cost lots less perhaps half....well in pounds, than the E27 I'd pay in Germany for a new screw in nib. So one could get EF, F, M and B.....Three more nibs for say E-80.
Is my plan to get a 200's B nib from there.....hey....$5-10 here, $5-10 there, next thing you know you have a couple bottles of ink.
I do like regular flex nibs they are better for shading inks than the wetter vintage semi-flex.
400/600 will be semi-nails and butter smooth.............good nibs to later make stubs or CI's out of.
The 200/400/600 will take semi-vintage regular flex nibs, or semi-flex vintage nibs.
The 800 and 1000 have their own nib sizes and will not do the others nibs. They will be big blobby nibbed and butter smooth.
It is possible to get the 800 used, with nice regular flex nibs..'90-97............the '87/88-90 W.Germany 800 has a great springy regular flex nib. That is the 800 I would get if I was going to buy a 800. Of course semi-vintage is not butter smooth.
M is smoother than F, which is smoother than EF. EF is worthless on laid or linen effect papers. It is too narrow.................well with Pelikan you can get a few fatter spare nibs.
Noobies because the gel pen is so much smoother than the old ball point, spoiled and think every fountain pen must be butter smooth..............when often that will be too smooth for slick paper and or with wetter inks.
Some learn how to make their nibs butter smooth, and come back a year later and ask how to get rid of butter smooth.
Once you start with Pelikans, you will sooner or later go semi-vintage or vintage.....much cheaper much better nibs........IMO. They will not be, nor need be butter smooth.
Good and Smooth, the level under Butter Smooth, is quite delightful. ...Yes, sadly, if you put your mind to it....there is paper under the nib ....but only if you put your mind to feeling it.