In general I've purchased my (and the family's) coated nylon ponchos from Campmor. They seem to be decent quality at a similar price.

As Chris alluded to, the lighter the poncho the more flapping in wind. Some folks tie a belt or rope around the waist to try to lower the flappage, but for me that starts to lose the ventilation advantage of the poncho.

Of course the other real problem with a poncho is that in a heavy rain EVERYTHING below the knee (or slightly higher) gets soaked. I've thought about looking for some Goretex leggings, but haven't.

Also, I never liked wearing the nylon hood, so I tend to wear my Tilly hat, and let the hood flop in back. Sometimes that means its left to collect a pool of water. In the end the best bet is to wear fast-drying non-cotton clothing and simply try to minimize the soak-factor. When it rains you'll probably get wet one way or another.

At one time I found a great deal on an Exped Bivy Poncho. It has snaps and ties that can turn it into a waterPROOF bivy (I'm not sure that's a good thing). The reason I like it is that its taller/longer than most ponchos, and since I'm 6'5" that is a good thing.

I like ponchos that have loops on the corners to that could be converted to a shelter fairly easily. I'd rather have nylon loops than grommets.

I have a coated nylon rain suit, but when I wear it I sweat buckets, so I don't wear it much.

Some day I'll invest in a Goretex suit, but that day hasn't arrived yet. Maybe for my 50th birthday next year. Oh these aching bones!!

Ken