You're welcome Bob. I paid about £30 for my motors. I certain'y wouldn't pay £75- they must have gone up a lot but there are various incarnations of the Graupner 700 as Dave says.
I was frightened stiff about Lipos when I started using them but with the kind help of my local model shop owner (yes, we still have one) who talked me through it, I now find them easier to manage than Nimh batteries. You just have to follow the rules and think about what you are doing. They would certainly give you more 'oomph' than Nimh. I always charge mine in a fireproof bag and transport them in it too.
But I do agree, the costs can run away with you in the quest for performance!
Thoroughly enjoyed the Ellie build this year and looking forward to more of the same next year- much better than the telly!! Can't wait to see Brutus taking shape.
All the best and happy Christmas.
Ian