I had a 15" Powerbook in 2005, but I upgraded to a 17" MacBook Pro in 2006. I would never go back to a 15" screen after having the 17. It's just so much nicer. I'm one of those people that have a video playing, an IM session and surfing the web all at once. I do that regulary and infact I'm doing it even now as I'm posting this message. And although you can do these things on a 15" screen everything is just a little to squished.
The webpage requires much more scrolling and images may make you have to scroll sideways aswell as up and down. The chat your having will be condensed in to showing only very recent communications back and forth instead of a larger history. And the video well its either overlapping on the web page or so tiny that its not worth watching.
A lot of people say the 17" is 'Too Big' but its only 2 inches larger then the 15" but has a massive increase in resolution as a result. I personally feel if you find the 15" comfortable to lug around then you won't have any trouble with a 17" but if you already find a 15" MacBook Pro large and difficult to take with you then obviously a 17" MBP will be worse.
For me the choice of a 17" Model is obvious. However I feel Apple are missing a key configuration. At the moment you have two default configs of the 15" a Lower end and a Higher end. one with 2GB vs 4GB, slower CPU 2.4GHz vs 2.53GHz with 3MB L2 Cache vs 6MB and a 250GB HD vs 320GB. I feel they should do the same with the 17" and have it match the price of the 15"
So in an ideal world there would be four configs as follows:
15" Low-End: 2.4GHz 3Mb L2 Cache, 250GB HD, 2GB RAM = £1,369.00
15" High-End: 2.53GHz 6Mb L2 Cache, 320GB HD, 4GB RAM = £1,712.00
17" Low-End 2.4GHz 3Mb L2 Cache, 250GB HD, 2GB RAM = £1,712.00
17" High-End: 2.6GHz 6Mb L2 Cache, 320GB HD, 4GB RAM = £1,949.00
So as you can see the Low-End 17" would match the high-end 15" in price so users can choose if they want the faster speed on a 15" or the higher res screen + 8 Hour Battery with lower specs on a 17" I think Apple should do this as I know people who just want the larger screen without requiring the extra speed over the 15" model. What are your thoughts?
I'll be buying a 17" once the early adopters buy some and the bugs get ironed out but I still think Apple should invest in a lower entry price for the 17" Not everyone needs all the performance that Apple are selling in that model.