I'm sorry, but the break even point is not 2 months, it's 2yrs.
1/2 pt is 1/2 point, regardless of how you look at it. So, lowering your interest rate .25% (from 5% to 4.75%) means that in the first year, you will pay .25% less interst in that year, or .5% in interest in 2yrs.
If you can say beyond a shadow of a doubt that you will be in the home for a length of time, pay the points to get the rate down.
Finally, don't sit on standby waiting for rates to go lower. I can't tell you the number of people that miss out on the fun by sitting on the sidelines waiting. If it benefits you now, lock it.