The Montblanc Meisterstück 145 Platinum with F nib is recommended as a long-lived all-rounder that meets the typical requirements. Anyone who must stay within a student budget fares well with Lamy models (e.g. Lamy Studio with gold nib). The choice of fountain pen is highly individual — some prefer light, small pens, others large, heavy ones. An 18-carat nib brings, compared with a 14-carat nib, hardly noticeable differences in writing.
Related pages on fountainpen.de:
• Montblanc Meisterstück 145 (Classique): https://www.fountainpen.de/c-montblanc-meisterstueck-145-en.htm