My favorite light jacket is a few years old by Sugoi, it's a nice lightweight fabric that blocks some wind and breaths really well. When it was new it could stand up to a little bit of rainwater that would just bead up on the surface. As it's gotten older it's not quite as water resistant, but it's not bad. As far as I can tell from the pics, the newer generation of my older jacket is this jacket by Sugoi called the Stealth.

If I had to buy something new now *twist my arm ow!* I'd probably look at the new Sugoi Stealth or the Pearl Izumi Whisper. I have the Whisper Vest in the screaming yellow color which is great for visibility. The fabric is really nice and lightweight but it is soft and quiet, doesn't crinkle or swish. I find the fabric on the Optik to be a little plastic-y feeling and noisy.