I think I'm reaching the FP endgame soon. I ended my Head-Fi purchases last year, I wont be touching new stuff for a while.
Not sure if you know about the Pilot Falcon nib. Its not the metal falcon, but the Custom 742/3 with the FA nib. It has good amount of flex, probably the most flexible nib out there in modern pens.
I've placed an order, should be getting it soon.
What other hobbies are you interested in?
Oh yes, the one with the sexy cutouts in the side? I've seen it, but don't have one myself. I ended up using dip pens for copperplate writing. Those old nibs are in so little demand that I got over 150 NOS dip pen nibs for about $20 on eBay, mostly Esterbrooks. That FA is a fine pen to complete your collection with from what I hear, though.
The other things I collect are knives, watches, sunglasses, flashlights, lighters, and of course headphones. There are a few other hobbies I dabble in a little bit, but not to the same degree as the others. Are you active in areas other than pens and headphones?