Definitely recommend you go with a 180 F stat.
Drilling it will depend on where you live. If your winter temperatures drop to freezing or below, you shouldn't drill more than one or two 1/16" holes in it. In fact if it really cold like in Canada, don't drill any. Your heater won't warm up your toes very well.
The drilled holes benefit is only to take longer to warm up, like when you are drag racing. The downside for everyday driving is that the engine stays in rich loop longer and your mileage will drop 1 or 2 mpg.
I now have a 180 with 4 holes in it and I plan on removing it before winter with a 180 with 1-2 holes or none, I haven't decided yet.
Check the vendor links in this forum. You can get a 180 in most. ZZP, GrandPrix store, Bonneville Attitude, 3800performance, Autozone, etc..... all less than $10.