This doesn't answer your question but assuming the well production is sufficient you should size the pump based on your actual water need and not what is typical in the area. The fact that you are considering a CSV would indicate you will not always be using the maximum pump output (estimated 10 GPM at 200'). If you were using the full output you would not need the CSV. So you might consider a smaller pump, unless you truly need that 10 GPM at times.
If your installing new irrigation you have some additionally flexibility here, by sizing the irrigation system to match the pump output.
Do your homework (i.e. read the pump curves) with regard to the pump selection ... my personal experience with this is a prominent driller/pump installer in the area suggested a 1-1/2 HP pump when he heard my well was to be used for a geothermal heat pump. Instead I installed a 1/2 HP pump, and probably could have gone with a 1/3. An extreme example for sure, but it shows what could happen when a pump is spec'd with no regard to actual water need.