sfschouten

I just purchased a second hand Dell Precision M4300. It currently runs 10.6.7 and i was wondering what would be the easiest way of upgrading to lion. Do i need to get a new install or can i upgrade? If i can upgrade do i just install a new EDP after? Anyhow i just want to know wich method to use,, im not asking for step y step instructions because i know there already out there.. many thanks