Upgrade to mac os x Lion??

Hey I just purchased a new mac but it has os x 10.6.7. ie "Snow Leopard" preinstalled. As I have come from using a Windows computer, I'm still unsure whether it is better to return the macbook and purchase one that has Lion preinstalled, or just keep this one and wait for the upgrade. Will the Macbook run better with "native" Lion software or is there no difference?
Also wondering how you would reload the Lion software without the disc if I somehow managed to crash the system (believe me, I make it entirely possible).

Lion is available now; no need to wait unless you want to. You can apply for the free download here:
http://www.apple.com/macosx/uptodate/
The Lion installer will create a secondary partition on your hard drive from which you can reinstall should it be necessary. If your entire hard drive fails, you would need to install Snow Leopard first and then download and install Lion. Or make a bootable installer disk of Lion, instructions for which can be found on the web if you search. Lion will also be available on a bootable USB flash drive in August for $69 US, should you wish an "official" installer from Apple.
It's up to you whether or not you wish to return your MacBook Pro and wait. I don't see much reason, and some good reasons to have Snow Leopard and then the option to install Lion when you're confident enough in it, and in application compatibility, to make the move.
Regards.

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