Great replies gents - much thanks to each of you.
The good thing is I've soldiered through the worst of this summer and so I THINK I'll try and keep a lookout for a Deutscher - I always liked them ever since I saw them a while back and the endorsement of folks here means a LOT.
Appreciate the endorsement of Greenfield or Cox as well - had considered both and was aware the hydro drive was a potential issue, the slopes aren't major or expansive but just something to factor in - perhaps I'll get some pix up at some point to add context.
Much thanks - as I've said to my wife at PRESENT (with my combo of using 3 different mowers on a full mow, 18" Victa 2 stroke utility in the chicken yard and VERY sloping bits, Victa 550 SP on the main bits and Honda HUT216 on the very convuluted front) you have to think of the mowing as a 'cardio' session as the amount of effort required - but when seen that way it's not so bad....atleast and hour or so after being done.
Much thanks again - great info and I've made a note of ALL of it.