The quad machine is a joke
Sorry to be grumpy but I would suggest no one pays for the quad machine. Having only 4 ram slots (should have 6 for triple channel support) and only having 8GB ram is sick and wrong. (Consumer boards support from 12-24GB of ram).
Photoshop and Lightroom want Ram so if you run both at the same time (and both can eat up to 3.8GB) you want MORE than that for the other 12 programs you might have open.