Firstly thanks to all for the responses.
I decided on the open type particularly the DT990's - but there seems to be two models ? One advertised as the DT-990 Pro and the other as the "DT990 Edition". There is a significant price increase on the "Edition" version.
So it looks like the Pro type are built for Professional use and are more rugged than the Edition version which seems to be lighter and targeted at home use.
In a nutshell:-
Heavy, closed and rugged -> Get the DT 990 Pro 250 Ohm
Light, comfortable and open -> Get the DT 990 Edition 250 Ohm
Some of the reviews indicate the DT990 as having bass and treble boost - but the DT880 as being flat.
https://www.kenrockwell.com/audio/beyer/dt-990.htmSo one is reviewing all of these at this time. Prices seem to be all over the place.
If and when I finally decide - and purchase - then a short time later Wireless phones come out with zero latency or close - I will go mad

----- Unless phones come out that correct bad notes.
When my Sony phones finally die - I will replace with the ATH50x probably.
Cheers for now