bushbunny, thank you for your considered response. I had more or less concluded that I would sit out this one until I read your further views, so now I am back on the horns of the dilemma again!
A bit more time will be needed on my part, considering I am trying to plan carefully a small number of pens which suit me (plus a gift for my son). I do not wish to make the new-enthusiast mistake of over-buying before I have more experience of pens different from my Waterman, while on the other hand I know this pen's availability will be limited. Patience will win for a few weeks yet, alas.