I've been seriously considering buying one of these to replace my MBP (2.8 C2D), although, I do have a few concerns. I am a contractor and tend to travel around a lot with my laptop, so if it was smaller/lighter, it would really make my life easier. So, it basically comes down to performance. Is there anyone here that has the same dilema or has just bought one and plans on using it for development? And for a bit of background - I use Netbeans for my IDE, and I do Android, IPhone, and Web Development (PHP), mainly. Also, a difference between the 1.4 & 1.6 would be great too.