The choice is really simple: it's a Thinkpad series T, with an AMD APU, the most powerful configuration you can afford :)
The one thing that makes it harder for me to go the way of the think pad is the lack of models on display anywhere in Australia. For a 7 year commitment I really don't want any uncertainty about the feel of the machine. Lenovo do have plenty of ideapads available at retail and some thinkpads, but not the higher tier.