Hi Looking for some advice... Currently I have the top spec early 2011 MacBook Pro 15 inch. Best processor available at the time (i7 quad core), 8gb ram with 256gb SSD Think it's time to update and get a device back under apple care. I have had the main board replaced twice under warranty! I would prefer to drop down to a 13 inch pro but want to ensure that I am not going to see a decrease in performance. I am looking at the top spec model and see that the processor is only dual core. These will be differing processor architectures but will the speed be comparable? A lot of the work I do is using VMware fusion so it would be good to understand the performance with a lesser core count. Any advice?