i doubt that you will get very many answers to a question like this, as first, very few people remember the exact performance of their older builds, to compare it to the newer ones, other than to say that they like the new one, and second, most people will just tell you to upgrade and find out for yourself, like everyone else did. however, i would recommend staying with x64 over the 32 bit sys. it will always be faster and you can use ready boost, or add more ram. although it will run fine with 2 gigs.