I have a spare 15" Macbook Pro that I keep in my office, to do personal "work" while at my job. I maxed out the RAM (4GB) but I still get the spinning beach ball at times when I am using a lot of apps. I usually have firefox, chrome, mail, calendar, twitter app, messages, and sometimes spotify open. I am often streaming video (MLB, netflix, youtube) and often use an external monitor. Will an SSD do anything to help prevent the slowdowns, or do I just need to upgrade to newer computer?