Hello and thank you in advance for any help. I'm planning on ordering a custom Lenovo ThinkPad T430 2344BMU (NVIDIA NVS 5400M Graphics with Optimus Technology, 1GB DDR3 Memory) to which I'll add an SSD for the OS (64 bit Windows 7) and 16GB RAM. My processor options are an i7 3740QM, an i7 3840QM, or an i7 3940XM. After several days of research my head is spinning and I'm still uncertain whether or not the higher-end processors are worth the extra cost. Certainly they score better on tests and what not, but given my computer usage I'm still unsure. Please, to those with a better understanding of processors than I possess: as a non-gamer but chronic heavy multitasker who frequently (re)encodes audio(s)-video(s) overnight (the rendering software will be on a RAM disk), would I actually experience a performance gain from the 3740QM to the 3840QM to the 3940XM given my usage? Thanks again for any illumination.