Hi, I've been a PC user for over 15 years and I have decided to take the plunge for a Mac Pro as I produce music in Logic in my spare time. I have a couple of questions I hope you can answer: 1) Can I buy non-Apple RAM to upgrade the system in the future? 2) Can I buy a non-Apple HD (the HD's that ship seem standard) to put into the extra bays at a future date? 3) I am going to run 2 x 19" monitors (I already have these) what video card should I choose? I will be only using the Mac for music production (logic) so don't need any 3D cards etc. 4) Also any other tips\tricks to get the Mac Pro for less. I'm not flush with money at the moment! Thanks in advance... PS: I'm based in the UK.