I was a very happy user of a Sony Vaio N505X (running Linux

). It had two years of hard use while I was commuting by train, and the quality and reliability was excellent. Not the smallest or lightest you can get (roughly 10" diagonal, weight about 2 lbs.) but the right balance of size and ease of use. If I needed a similar machine today I'd go looking for whatever the modern equivalent is.
Customer service? Dunno, never needed it.