I'm planning on getting a new 27' Retina w/ 16gb of ram and a 512gb ssd. I'm coming from a mid 2010 21' w/8gb of ram. I'm pretty much using my IMac for day trading. I usually have about 2-3 windows open on Safari while using 7-10 tabs. I also use some proprietary software from outside venders. Obviously my current setup is quite slow. Is the new I7 over kill for my needs? TIA.