Do I need to buy an expensive motherboard for gaming?

I am building a gaming PC with the intention of using a single graphics card. I have a good handle on what makes a good CPU (clock speed/number of cores), VGA (memory speed, clock speed), and RAM (speed, latency). I see a huge gamut in the pricing of motherboards available. What makes a good motherboard? Is it the chipset, FSB (I don't even know what this is!), or something else?

P.S. I could not find the search button, so sorry if this has already been covered.

I prefer Gigabyte, ASUS and EVGA brands. To me the brand with the most features that support the best upgrade path for me later down the road is what I go for. I usually look to spend 100-150 for a decent board. I have spent 250.00 on a board a couple of times and have gotten as much enjoyment out of a board that cost less than half of that so no you don't have to spend a lot to get a good gaming system. I'd say 80 to 130 dollars is a pretty jam up board if you pay attention to the features it has to offer before you buy...