Hello, I currently have an early 13-inch 2011 MacBook Pro (2.3Ghz i5, 8GB RAM, no SSD). I find my current machine is just kind of sluggish, boot is slow, etc. I've had it checked out multiple time under Apple Care hardware is all good nothing wrong, and that boot time is expected. So I think the machine is just no longer meeting my expectations and I need something quicker. Would an upgrade to a 13in retina Macbook Pro be much different from what I have now? I assume the SSD would be a significant speed boost. Are the displays that nice? Just trying to decide if it would be worth the upgrade, and whether now is the time to by the retina or if there is "better hardware" recently released waiting to be implemented that I should wait for. Thanks so much!