Over the years I've tried just about every fashion kayak and still kept coming back to either my trusty RPM for easy water or my Micro for bigger.
Nothing I found gave me:-
comfort
easy roll
manouvreability
confidence

as much as these 2. Until now...

I purchased a Diesel 65 at UK Canoes in Lancaster and haven't looked back since. It is brilliant.
Easy to roll; no hard edges; excellent fittings and seat; and its performance on the Cumbrian rivers thus far (Rothay, Leven) and the Lune have made me fall in love.

Oh - and it is seriously light to carry - major factor when you get to my age!! If you don't believe me try carrying an M3 upstream for 1/2 mile.

Another review commented on the plastic. Mines ok currently and it has taken some pretty big hits.