
Nevertheless, thanks to everybody who helped me getting my new netbook:
When I started I had an Asus for 279 EUR in mind and came from E130(~400 EUR), X61(used), X230 (~900 EUR), to a T420s in UK layout (new without box ~600 EUR).

Thanks for mentioning the better keyboard on the X61 and the bad build quality of the E130.
The older models indeed look much better with their blue Return key and non-chicklet key caps.
