I am seriously considering switching from a Win7 laptop to MBP. I've read that later this month or next month the MBP's should be shipping with Lion. If I buy now I understand I will receive a free upgrade to Lion. Is there any advantage to waiting to get a MBP with Lion pre-installed rather than an upgrade.

Also...I am have a great deal of trouble deciding between a 13" and 15" MBP. I use a 13.3" now and love it with no problems with the small screen size. I am considering the 15" because I would like to get the HD screen and and the AMD video upgrade. Cost is not much of a concern...really I am just trying to weigh the extra power vs. the additional size that come along with it (the 15" just seems big after working on a 13"). Gosh I wish they made 14"!!!!!

I would love the forums thoughts on both the above...