Light the torches and grab the pitchforks! He has spoken HERESY!
Both of my Pelikans (M150 and M600) are my best performers, journalling, book keeping and everything in-between.
Like folding knives your price to performance peaks around $100-$150 (I like piston fillers).
The fountain pen is an infinitely superior writing tool than the common ball point pen (with the exception that you cannot make carbon copies with an FP). I have always been incredibly frustrated with ball points, they just quit randomly, at one point I actually started using felt pens instead.Then about five years ago I bought my Pelikan M150 and it's been bliss ever since.
The best part is you can tune almost every characteristic of the writing experience, broad, fine, italic, write extra wet or dry, any colour you want, waterproof or washable, all in the same instrument (not all at once, of course).