My birthday was on the 15th, and my dad (who is currently on a business trip) asked me what I wanted. I had had my eye on a few pens as of late - all of which are piston fillers - but I finally chose the TWSBI 540. My reasoning for this is that it's fifty dollars.
Wait, I need to let that sink in.
Fifty. Dollars.
For a piston filler.
At this time, I suspect any person who knows what a piston filler to be on the floor and crying with happiness.