Ahhh where to start.
Gold vs steel.
Had this conversation a hundred times and it never gets old. In the olden day 50 to 60 to 70 to 100 years ago you wanted a gold nib. The inks were so caustic that steels would be eaten up in a short period of time. Almost all the 1st and 2nd tier pens had gold nibs. Even the much vaulted "51" was golden as the superchromium ink used in the "51"'s was tough on anything else. Fast forward to today. Steel/Gold, to me, is mox nix. Unless you are looking for flex or have a big honkin exposed nib steel /gold is the same for me.
In fact most of my Modern steels run circles around my Modern golds.
If you want a hooded nib a "51" can't be beat. Personally I am not entralled with piston fillers.
Thee 2000 is IMHO is overpriced for what you get. Pel 200 is a great pen !!