I've seen a few that claim to give a firmer ride and better handling, but let's be honest we don't drive these things for the sporty handling and the ride is quite firm enough!

My findings for road use. Never go off-road wildly enough to notice difference...
I've got Koni's on my '95. Much firmer ride and controlled high speed directional changes
I've got Monroe's on my '02. Slightly more "controlled" feeling, especially on rebound. Bit less "wallow" than the standard ones.
The standard Boge ones are pretty good though, especially when new, and great value for money.
EDIT- the Boge's are the OEM shocks. You can pay twice as much for the same thing with a Land Rover label!

Boge.......

OEM ... the gas filled ones can be very harsh.

Stay with Boge if you want comfort I would say.
I went the Gen3/Terrafirma TF144/145 route. The ride is OK but quite a bit harsher than the factory Boge and Dunlops at std ride height.
The Terrafirma combo is much better off road however, also at motorway height and also when towing would you believe.
I have a heavy caravan with a high nose weight (like 100kgs+) and it is tightly controlled with no wallowing or bouncing around. It is very stable.
Also solo when I have a lot of weight in the car such as cement mixer and bricks! and 4 people.