I don't have the money for a whole new system at this point and I doubt I will anytime soon. I'll probably be riding this one out for quite a while. I'm good with spending 100 on a mobo and use this system for another 3 or 4 years. Then, I'll end up building a whole new, current PC.
If I go with anything newer right now, I'd need new RAM and CPU. I've got 16 GB of DDR3 already and I got the i5 for free.
Here's my build if I include the mobo and the i5