All these jackets and pants with the removable liners and layer in a perfect word sound great. But my issue with them is I don't like to stop and you know how it usually works out. Your rolling along it looks like rain so your like do i stop? Can I make it to the next gas station before it rains? Maybe I should have put the liner in the last stop...No, it was too hot and I'd be sweating balls right now. So you think you can make it a while longer so you don't stop. Then it starts to rain but you think, "i'm only 2 miles from where I was going to stop". So you roll, then i begins to pour. Now you soaked already so your like "fuck it. i'm already wet" Then you have the thoughts of "If i'm not going to use it, why the fuck did i buy this jacket with the liners?"Or the story goes the other way, you did stop on the side of the road to put in the liner but it didn't rain. But now your wet anyway from sweating balls because most zip out liners are not breathable.
That's why I say even though it might be a tad warmer on hot days the built in non removable breathable liners are the way to go. Gortex is usually the best but the off brand stuff works pretty damn good too. When I'm rolling and it starts to rain usually only have to reach over and zip closed a couple of shoulder and or chest vents. If it's really hot and i'm rocking my mesh I don't even care if it rains. I always have a fast drying shirt on underneath and it's very refreshing on a hot summer day, it will dry in no time.