Hi Diez2u - I dont thnk you got much of a response because the questions you asked are hard to answer effectively, without more info. All the bikes you mentioned are good, but if they are good for you is a harder question.
I think for people making the transition from cheap bike to first real MTB, the best first stop is a good local bike shop who can walk you though sizing, and what price range would best suit what your trying to do. Its hard to offer meaningful advice online. Really good hardtails can be had for £600 or so...
http://www.mbr.co.uk/reviews/hardtail/v ... view-2013/and i think you need to be riding some reasonable terrain before needing to spend more than that.