I've decided to gift myself with my first expensive fountain pen - the Montblanc Meisterstuck 149. Fine nib.

I know next to nothing about buying expensive pens (expensive, at least for me). I would like a gold nib, but of course, I don't know the difference between 14K and 18K or which one I'd want. Or, if it makes a difference.

I also don't know the difference between the 149 and 146, other than the 146 appears smaller. Or how either compares to the LeGrand?

Background: I am not a collector or reseller. The few fountain pens I have - Opus 88 Demonstrator, TWSBI Eco T, Kaweco Sport, Lamy, and Waterman Phileas, all have Fine nibs and ALL are workhorse pens. I write everyday, I expect my fountain pens to write as well. I am not looking for anything temperamental or finicky. I do not live near any fountain pen stores or clubs.

I'm in no rush, however, if the right deal came along, I could act quickly!

Thanks everyone.