My problem with W7 convertible tablets is that they are expensive. I just got a ThinkPad X220 for $900 - a similarly configured X220T, lacking an IPS screen and 9-cell battery (neither is an option) ...
I have an odd bug on my W7 tablet, it's an older model (specifically an X41) but still works very well for what I use it for. I put W7 on it a long while ago, and it's been running fantastically aside ...