Have you thought about a klim marrakesh (not mesh but is vented in terms of bleeds air through the material and very elasticated and lighter weight0 with say a cheaper waterproof nylon jacket (mountain warehouse about £30)
The marrakesh is light and very elasticated and then the nylon if its raining or gets the dirt
just a thought
I have lots of Klim jackets but unfortunately mine are 3xl.....but have a grey klim "blade" jacket which is very similar to traverse, with armour, 3xl and £140 posted if it might be of interest