Well, thought I’d replied and it never updated - so, apologies for that.
Appreciate the detailed response, @MWJB, looking through the forum you seem to be something of an expert in these matters so thank you for opining on the V60.
I ended up getting one as found a silly price for one delivered that undercut even Amazon and it arrived yesterday, along with a bag of new 02 filters that may be the type you describe as being awful, based on the info towards the end of the thread below.
https://coffeetime.freeflarum.com/d/666-v60/561
The V60 Decanter I bought came with a sealed bag of papers in the box (far more than the 10 the Hario site specifies) that are bleached white with the round tab, but the new 02 filters are both larger and have a squared-off tab.
With regard to the Kalita, I would prefer a conical-shaped filter as it would benefit my cocktail experiments, but am eager to hear more about the filter paper issue on the V60. Is there any reliable source of the older ones?