Intending to upgrade from XP to Win7, on my 2730p with SSD. Currently running as supplied with 2GB RAM. General SOHO use, some image editing, but generally heavy multitasking, heavy web use and home network. What is the max memory possible to install in the 2730p, and what do people consider to be the "sweet spot" wrt to memory? With that in mind, what is the most appropriate Win7 version for a fresh install - 32 or 64 bit; Home Premium or Professional? Any comments or experiences appreciated. TIA.