A silver one
It's super easy but all new Macs from Apple will come with Lion anyway.
Apparently not. All new machines (MacBook Air and MacMini) come with Lion, but there is still older stock (MBP, MacPro and iMac) that are loaded with Snow Leopard and will be sold with that.
Anyway, 15" MBP with Hi-Res Glossy Widescreen Display or Hi-Res Glossy Widescreen Anti-Glare Display?