Thanks everyone!

I've decided to not be afraid of the giant resolution 15.4" and go for it. Its definitely going to help when I'm doing some work and that is the main reason to get it in the first place.

It may not be as vivid, have as good battery or have as good viewing angles as the LED model but I think I'd be okay to suffer a sub-10% drop in those attributes for the extra resolution.

As it stands my 13" Rev. 1 Macbook display is pretty shoddy really and I've been using that for just under 3 years - so I bet nearly anything will feel like an upgrade

If the sales dude ever calls me back and they deliver it I'll give my opinion of it here. There is surprisingly little good information about it elsewhere on the Internet.