tubbymac, you are one lucky person except the fact that you got the lines issue in your MBA 😛. BTW, what did you do with it? Did you replace it with a MB or something?
My thoughts now are MBA (55%) vs. TT (45%) mainly due to the lines issue and some of the light bleeding which is not acceptable when the TT does NOT have any of that.
I don't consider myself lucky. I'm extremely picky and the only reason I've gone through so many brands/models is I'm still trying to find the "perfect" laptop. I've never had an MBA. The 2 gig fixed ram limit is what held me back on the MBA when it was introduced. It wasn't until Steve's keynote introducing the aluminum unibody MB and MBP that I went to the store the very next day and bought an MB. I didn't bother waiting for any reviews and assumed it was just a mini version of a MBP which would have been perfect for my needs. Got burned with the low quality MB screen due to my hastiness and that's why I'm being extra patient on the MBA. Already got burned on the junk MB screen so I don't want to get burned again with horizontal lines.
The thing you should carefully consider about the Sony TT though is that unlike the MBA and the Lenovo which have "full size" keyboards that FEEL like a desktop keyboard in both size, spacing, and such, the TT is a reduced size keyboard. So your hands get closer together, your fingers aren't as spaced apart as usual, and the arch of your fingers is more cramped than usual. The feel is entirely different from what you're used to.
Another thing to check is that for some reason I've heard Sony removed the vertical scrolling from the trackpad on the TT. They had that feature on the TX but yanked it from the TT. I haven't verified this personally as I'm not interested in a TT, but make sure you test that at the store. Scrolling by having to drag the scrollbar manually or with the arrow keys is painful when you're used to two finger Apple scrolling.
The other thing I should mention about the Sony Vaio is that on my TX the drivers were locked to the OEM version of Windows installed on the machine. What this means is that if you want to do a "clean" install where you get a retail DVD of Windows, format the drive, and install from scratch, the drivers will error out saying that you need the OEM version and not the retail version of Windows. Made it quite painful to upgrade or change the OS (like for instance if you wanted to run Windows 7, the drivers won't work as you can't get the OEM version of Windows 7 yet).
The Sony Vaio was the hotness back in the days before the MBA was invented. It started a lot of conversations when people saw how small it was. But I really think it's old news now. The MBA is a much better machine IF you can get one with a good screen.