Got an HP dv7, older Core2Duo which isnt great but seems to run a fair amount of VST's quite well! Thinking of moving to a dedicated desktop system though for that extra speed, plus my laptops bunged up with all sorts of internet rubbish like most people's I imagine!
The bonus with the laptop is I can have that perched on the laptop stand to the side of me with the HDMI connected to my larger monitor so I've got dual screens to work with (Ableton sort out support with this FFS!). Despite the reports...HP's been realiable for the last year and a half (Touch wood)
Sony VAIO.. 15.5" Full HD.. Bluray ROM.. 2x2.6GHZ etc etc.. Works like a charm! I build my own computers as well, but only desktops. The last one I built isn't quite a smooth as the VAIO, but it's also a few years old now.
Well I've been running ableton on it for three years and haven't had much problems with it
only thing about the laptop itself is that the webcam stopped working and I tried reinstalling the drivers to no avail, so I have an old eyetoy from my ps2 that works as a webcam, although I never really need a webcam.
It never overheats or anything, but I have had bluescreens in the past, I don't think those have anything to do with it being a Sony though
I had two different laptops I used to produce on. They both were toshibas and had 2 gigs of ram but they both crashed after about a year because I was trying to use so many plugins and tracks. My iMac has already outlasted both of them and has never even frozen. Macs are just so much more stable.