But will the 950 going down to the 930s prices make things (like the 930 and 920) cheaper or are the discontinuing those?
I think Intel is clearing out inventory of 45nm quads in anticipation of Sandy bridge 32nm cpu's coming out this fall. If your time frame is within the month, then get the cheapest 9xx cpu you can and give it a conservative overclock. If you can wait until the end of the year then look to the new line of cpu's. They will all strart out clocked >3.0 and will probably perform better clock for clock because of the revised architecture.
As to prices, I expect not much drop on the 920 or 930. Since all three chips can be overclocked to about the same limit, their value will remain the same, giving a slight premium to the faster ones.