Hi Arnoldus,
Some two momths ago I had the same problem and basically the same question in that thread you might find some ideas.
http://www.bushcraftuk.com/forum/showthread.php?t=35773
I must say that eventually I decided to spend some more money and went for an windshirt from hilltrek. (single ventile is 130 pounds, I got a double ventile one with some extra modifications so it was somewhat more expensive).
It arrived last week, just in time for the dutch bushcraft meeting last weekend. I must say it performed perfect, kept me warm and dry. And it really has seen quite some showers and wind over the weekend. Also during the weekend I haven't had that clammy soggy sweatty feel I always got in any sort of technical jacket.
So although I I also didn't want to spend a lot of money on a jacket to start with, I'm very happy I did.
Maybe you should lookup as much as you can about ventile here at the forum (especialy the pro's and con's of double versus single ventile). and reconsider.
Also if you need help, I'm sure Hilltrek will be happy to help, ask for Bill.
No links to them apart from having one of their products.
Hope this helps. By the way if you want to see Ventile at first hand, maybe we can meet sometime, be happy to show you mine. Just PM me.