I'd like to keep it under $850. I'm assuming the new processors are more efficient--my old pentium 4 is 2.2ghz and it's slow.
You can get a very nice one for under $500, so your problem will be to decide which one. I don't find it all that much faster then either of my desktop P4's, both 3.0GHz. Laptop is running Win7-64bit, desktops running WinXP. It's the features they now cram into a laptop, wireless-N, Bluetooth, fingerprint logon, USB3.0, HDMI port. Laptop even has 8GB RAM & 7200rpm drive.