I have a Vaio AR11M. I've had it since 2006 and its a very good, well made laptop. It is definitely not value for money (I bought it new for £1200) but the screen is beautiful and its great to watch movies on. Even now my 2006 model is getting a windows score of 4.0.
Specs are: Core2Duo T2100@ 1.8GHZ, GeForce Go7600 128mb, 2GB RAM, Fujitsu 2.5" 5400rpm HDD 160GB. I recently put windows 7 on there from windows xp and have had no issues at all. It still flies in simple tasks, never played games with it (except Braid). These AR laptops make fantastic media pcs as the come with a remote and media centre, not to mention every other kind of connection you can imagine (HDMI, various audio connectors, TV arial connector, firewire, bluetooth, 2.4/5Ghz wireless....)
What are the specs on the vaio you are looking at?