David wants to know what laptop to buy. Leo says that Lenovo's ThinkPad line is really second to none, but HP has been getting much better since they spun off the computer division into a separate company. Then there's Acer, which is a good budget brand.
For between $900 and $1500, he'll be in good shape. He doesn't need an i7 processor for most things. Lenovo has a great premium service plan called One Day Off Site Support, where they will come to him and fix or replace it within 24 hours. It's a great option for businesses.