First mac : Snow leopard or wait Lion??

Hello everyone!
I don't know if I'm in the good category to ask this but I'll try here.
So... I want to have a iMac 27" since long time and I now have the money to buy one. So I was wondering, should I buy one right now with the included Snow Leopard or wait to buy one when the Lion will be out this summer? Or buy now and upgrade with Lion after? I also hear that there will be new iMac too with uncluded Lion so maybe I should wait for new hardware... I really don't know what to do...
I need your advice please..
Thanks!

Look carefully at the specs for the model and chip you're considering.
Some i5 and i7 chips are quad-core (4 processors on one chip).
Like the older Core Duo and Core2Duo chips, all i3's are dual-core, and the i5's in the 13" MacBook Pros are dual-core (2 processors on one chip).
Newer chip designs use smaller internal chip masks, leading to greater performance or lower power consumption (important in battery-powered laptops), or some compromise of both.
So *in theory*, a quad-core 2.93Ghz chip will give you more processing power than a dual-core 3.6 chip. Here's the math: 4*2.93=11.72, and 2*3.6=7.2, but in the real world, your actual performance also depends upon the type of program and the video chipset. I doubt you'd notice any difference at all doing word processing and email. Video editing with a package such as Final Cut Pro would probably see a large difference.

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