Thanks Sylvia.
I was just wondering if any new models were being readied for release in the not too distant future. From what I have read on the internet some i5 and i3 models will be release in Q1 and Q2 2015. I think these will be too expensive for me so I will purchase a N2820 model just for a mess about with Ubuntu.
I knew about the N2820 and N2830 issue. I am hoping that I get the N2830 if I order from Amazon soon.