Well, I say building. I was given a PC from my previous employer as a sorry for the contract coming to an end. I had left it in a cupboard assuming it'd be fairly low spec (which it kinda is) but actually it has some decent components. Namely the Motherboard, which will actually accept anything up to a 3rd generation i7, DDR3 up to 2400 and SATA 6gb/s interface for a fast SSD. So I decided to see what could be done to improve it. In the short term, it'll have the following: -intel G2020 processor (2.9ghz dual core processor that came with it, on part with early i5's) -8gb Crucial DDR3 PC1333 memory -Samsung 850 Evo SSD (for boot, scratch and lightroom library) -500GB 7200rpm HDD (for storage) -Geforce 210 graphics (so I can get rid of the onboard) Down the line, I'll be looking to upgrade the CPU to a probably a decent Ivy Bridge I5, and at that point I'll put in 16gb of fast DDR3. Does anyone have any particular experience of CPU's they feel work especially well in lightroom?