Hi! First, what kind of gaming do you do, since you said "but do a lot of internet browsing at the same time" I assume it isn't CoD or Battlefield (tell me if I am wrong). Now:
1: SSD's are a waste of that $250, I would prioritize your upgrade like this:
Most Important: Graphics card
Why graphics card? Right now most games don't use more than 2 cores, so you have a decent (even if it isn't the best) CPU. The graphics card is the most important to get to have a high res gaming experience.
Why isn't RAM up in the top 2? 8GB of RAM is overkill now, in fact, my computer doesn't use more than 2GB (I have 4GB). So you can wait to get RAM
Why is the SSD last? The SSD really doesn't help much...unless you like fast boot times and such, but then you have to reinstall the OS on that drive and tell your comp to boot from that.