had nexens on a 3.0 Estate once, no grip.... when going for tyres i avoid would budget ones, its the only thing that keeps you on the road!
What model of Nexen?
I have 4 Nexen CP641 on the tractor, and they are pretty good imho. Cope well in Dry, good in wet, so-so in the snow. Awful in the very, very wet though - politest I could say would be 'interesting'. Little bit of road noise as well. Think I paid just under £50 a pop fully fitted (and remember that 225/55/16 seems to be an expensive tyre). Would need to check speed rating, but its whatever the manual said.
They are a million times better than the Avon ZV3's I had on the tractor before in all conditions.
Not sure I'd put them on the MV6 mind.
Remember, a brand on its own means nothing, within a make there will be better and not so good tyres. My favoured MV6 tyres - Dunlop SP9000 - is a bloody good tyre. Very good. Highly recommended. However, a Dunlop SP200 is a piece of junk.