You can buy D630's recertified on Newegg.
For the cost of about $350 (machine + copy of Snow Leopard + copy of Lion + Mini-PCIe WiFi card) you can have your very own Macbook Pro.
Native WiFi card: http://www.ebay.com/itm/NEW-Broadcom...item1e697ae7e1
Buy SL copy at store (e.g. Best Buy), Lion on App Store.