Thanks for the feedback!
Tinstaafl - We're not really that big. I'm around 5'7 and he is approx. 5'9/10.
I'm pretty sure the 150 is a 'G' model, would that be the slightly larger version?
CATS - Thr difference is a little over £20 per hour, but like I say that would allow me 4 t'n'gs or 2 full stops. I've been in both, the 150 most recently and I found them both in near identical condition. Is the 150 possibly better off in fuel?