For all of you System 76 users, do you recommend the extended warranty for 3 years? In other words, do you find you need this warranty, or is the standard 1 year warranty enough? I have never purchased a System 76 machine, and I am in the market for a new laptop. The 17.3" Kudu Professional looks like a good fit. Also, any issues running Windows in a virtual machine on these beasts? Thanks, Mark