I need a new computer that will be able to operate well in heavy multitasking environment. It will have 10 spreadsheets open at once, several internet windows, email programs, solidworks programs, quick books pro (big rescource hog) and adobe files. My current computer just can't handle the load, I was thinking I7 for sure but the rest I'm not sure on please help. Need this ASAP. Budget is whatever it takes to do this work within reason.