I have been obsessing over which one to buy. I could use some help to put me out of my misery. I've been looking forward to getting an SSD laptop for years and now it's finally time. The base 2.3 ghz would be an incredible upgrade. I currently have the base late 2009 MBP (2.53 Duo). The 256 GB HD is more than enough. I get by with about 100 gb currently and find myself using the cloud more and more. 8gb ram is more than enough. I use 4gb currently and only rarely find myself reaching the limit. My use is primarily the web and Office. I've always gone by the philosophy that those marginal bleeding-edge CPU upgrades are a big waste of money. So it seems I should get the base 2.3 ghz model and be happy as a clam. However My life and business is centered around my laptop. I'm always on my MBP. I work full time on various virtual businesses I create and run. I travel and live pretty much anywhere I want in the world, just me and my laptop basically. I make good money ($10k/month), and my income is basically limited by my productivity and time (a faster CPU might save me some time and aggravation, will it?). I can also deduct the purchase for business so that drops about 20-30% off the price. But I also don't want to drop $600 (after tax) to upgrade to the 2.7 for basically no benefit, that's a poor investment. So, what should I do? Over a year of full-time use, will I shave, say, 10 hours of wait time off my use? If so, I should just go ahead and upgrade. On the other hand, if my savings amount to a few imperceptible milliseconds per day, then I should stop wasting my time with this question and just get the base model. I know I'll look back on myself for being silly for thinking about this so much, but right now, I basically can't do anything else because my brain is so locked up on this. Your help is appreciated. Thanks.