Sorry but I don't believe anyone who claims to have found the Holy Grail of motorcycle clothing in one suit.
If the suit that gives suitable impact protection, abrasion resistance, is totally water-proof, warm as toast in the winter and cool as ice in the summer had been constructed, we'd all be wearing them and all other's would be gathering dust.
I have a range of gear for different circumstances. Broadly this falls into two categories:
One is a suit or combination that I can wear additional layers under for added warmth. It is water-proof but not toasty in winter.
The second is a water-proof suit that needs additional outer layers for warmth.
It really doesn't matter how many vents a jacket may have, it will still be hot if it's worn in hot weather and there is no airflow passing through the vents.
The same jacket is going to allow more cold air in via the closed vents in winter.
Anyone who reckons that they can remain completely dry on a bike in hot wet weather is talking bollox. You have two options when it's hot and wet, you either get wet from the inside or you get wet from the outside.
(Before anyone points to their Stitch and claim it's the Holy Grail, sorry but I've seen enough reports of them leaking through the zips and puddles in the folds that then leak, not to be convinced they are any better or any worse).
I have found the right combination of gear that suits me and the various conditions dictate what I wear and when.
I live with the fact that at times I will be hot or cold or moist (Mmm, moist!
).
Here's a link to a dealer: 
and I look a twat in it 
