So I purchased the Singe-Ray reverse grad listed above and the Hard Edge Lee, the Soft Edge being out of stock. Both .9/3 stops, and I did some quick tests last night.
The Reverse Grad made me wonder why I got it on first sight, the reverse gradation is so gradual it seems like a normal GND would work just as well. This is just by visual inspection, it wasn't as differentiated from the GND as I had expected.
In quick tests it worked well though. It was a completely clear and bright afternoon and I get a good view of the setting sun from my doorstep. It gave me a nicely blue sky, detailed landscape with proper exposure between the two shooting directly into the sun. Of course it reduced and in some cases eliminated flare. Nice shots!
The .9 Lee hard edge isn't the appropriate choice for where I'm shooting (not at the ocean) but it worked well and gave me a great sky.
Overall I'm loving the Lee system and the grads, I had the cheap Cokin system previously which wasn't as good an optical quality and vignetted. I use the LowePro Filter Holder to store these filters. I use the Blue tab for the Hard Edge grad (remember blue meaning water), the Red to hold the reverse grad (remember red sunset), white for the soft edge (gradual white edge for landscape) and the Big Stopper on the black code. Make them easy to find and organize.