hi, i have a 2008 quad core mac pro that I've updated with a 24 inch led cinema display. 16 gigs of ram, 5770 video card, and about 7tb of hard drive.. Im really a fan of the old mac pros but I'm noticing on fcpx video editing and lightroom 5 editing that the machine is a bit slow at times.. I would like to get a newer machine but i do love the upgrade possibilities of a mac pro and don't like the newer macs much since you can't really open them up and update them. any suggestions? I don't like not being able to access the latest os either. thanks..