I've never known a happy Vaio user, so good luck with that.
I was a very happy Vaio user.
Then I did the unthinkable- and actually clicked on a link on one of those FB viruses (the email from a friend with a link to a picture of you variety), and it wiped my computer out within a week. (I know, I know, I never should have been that stupid, but I had been sleeping 2-4 hours/night for weeks, and the email was from a friend, so I made a dumb move. Still kicking myself for being so naive).
I got an MBPro after- the 2009 silver unibody version. Got it because I could have more confidence in not getting another virus, and because my ex had one and I liked how nice it looked (the screens are just so pretty). This was very important to me as I had lost about 80 hours of work on my masters thesis that had been completed in the week that I had only backed up on my laptop (I know, I know- another lesson learned the hard way- again, with lack of sleep, I didn't do proper protocol re backing up externally).
While I loved my VAIO, I love my MBPro even more. I understand the specs aren't as nice, but I quickly became co-dependent on the MB because of the trackpad, battery life, screen graphics, lack of viruses, and the Spaces feature and the other buttons near it where you can move quickly between windows, quickly access a calculator, weather, etc. This row of buttons and the trackpad alone have saved me countless time and energy. Apple also has nice resale value, which is nice to get when upgrading to a new computer.
What I do miss- the VAIO was smaller and lighter, and packed a good punch for its size. MB Air is appealing to me, but friend's was constantly running the fan and I haven't seen newer versions operate to see if they fixed it since first gen so can't recommend that one myself.
I also miss a better sounding DVD drive. While I find the MBPro drive sounds quirky now, in reality it is a pretty horrific sounding drive.
Finally, I miss a seamless Windows system. I run VMWare Fusion for work and can't stand it (trying to fix that problem now). Even before that, when I just had Bootcamp, I was annoyed when I used it on my Mac. I don't think it necessarily ran Windows worse, but it just felt crappy to use Windows on a Mac- I think moreso because seeing it run on Mac makes me miss Mac OS, whereas if I don't have Mac around I don't get angry at my work PC.
There are also a few tweaks and issues with running Windows in a MB, like sometimes my caplock is on in Windows even when green light is off on my caplock key, audio didn't work in windows for awhile at first, etc.
It also annoyed me to have to turn off computer to restart in the other OS. I know, I know, this is just being spoiled, but it will be so nice when it is just really easy, seamless, and fast to work between the two.
Finally, because it had great specs, it was still a great machine 3 years after I bought it until the virus, which was also nice. It is so easy to get quickly outdated on a laptop, and it is nice we have such great alternatives to choose from
Anyway, hope this helps you consider the pros and cons. I don't mean to bash my MB here, I still love it more than the VAIO, but I wanted you to know all the cons before making a decision in case they are dealbreakers for you. The features I listed that I love are way more important than a silly sounding DVD drive, but for others that may not be true.
Good luck in whatever decision you make!