I currently have a quad-core iMac with 8GB RAM. This morning I purchased a MacBook Pro 15.4" with a 2.53GHz Core2Duo processor (Ebay). I'm a web and user interface designer and sometimes my iMac lags when I'm designing (it's probably because I have too much open in Photoshop). Does anyone have experience running Photoshop with these specs? I'll be running Photoshop CS6. Should my experience be OK as long as I don't load up too many PSDs?