To piggyback on this...kind of...I wouldnt rule out a windshield completely. As I said earlier I have a p1k5 and it has a windshield. But I bought the seizmik model with vents (I think it's called the versavent) you can open and close, so you do get airflow but not a ton. Some guys on here have also ordered extra vents from seizmik and added them as well and if I remember right, most if not all of their stuff has a lifetime warranty. I was hesitant to get one at first, as there are a million arguments both ways on this site. But...my very first trail ride after getting it installed my daughter and I were in it and took a bird off the windshield at 40 mph....had I not installed it, the bird would have hit me square in the chest....at 40 mph.... So, do they make the cab warmer, yes...but they also keep flying debris from hitting you or your passengers. They are also very nice if you ride at all when the weather is colder, keeps most of the wind off your face. Also if it hasnt been mentioned yet, a set of rear view mirrors is very handy to have as well.