If you want to go a little cheaper, you might consider the ASUS T91MT or
T101MT. They are two little EEE netbooks with a multitouch resistive touchscreens. As such, they are capable of using a normal stylus, unlike the capacitive ones with larger tips. They also come equipped with a keyboard and a trackpad. The downsides: the stylus comes without an active digitizer, which means the computer will respond when your palm touches the screen. As such, taking notes requires some practice, but most people report eventually being successful by placing their palm on the sides. Also, the processor is extremely slow, which means you will need to do some tweaking to get it to adequately run; however, once you get rid of all the ASUS bloatware, you'll find that it will run fast enough to handle most of your tasks.
I've had the ASUS T91MT for about two years. It is an excellent little computer, and you have numerous advantages over Android tablets; for example, you can install the full Office 2010 suite instead of relying on the crappy mobile versions (and, I will confess, Office already has an excellent set of inking features). Also, you can install the full version of Adobe Acrobat, which does an excellent job rendering *.pdf files. The main problem is that Windows 7 is just not designed for touchscreens. You won't be able to whip out your ASUS and quickly use it to check your calendar. You can't use it to quickly and easily take notes. In my opinion, you won't be able to completely replace a standard paper notepad with a Windows 7 device because of the OS limitations. For all those reasons, I've recently started using an Android device, although I must confess that I find it rather crappy for word processing.
One final thing: reading PDFs is vastly superior on an Android device. While I successfully read on the T91MT with Adobe Acrobat, I think the interface is better in programs like ezPDF Reader (which is hilarious given the enormous price difference in the software). Essentially, Android is ALL AROUND better for things that require touchscreen input. You might consider looking for an Android device with a resistive touchscreen (like the
Entourage Edge) or waiting around until Viewsonic's
Viewbook 730 launches.