out of these smart hubs which is everyone using and are you having good success? Also is anyone using these with iRule?
I'm using Vera, and I have had good success with it. I have around 40 or so z-wave devices. I have just started with iRule and have integrated it a little with Vera (using http calls, not the ViRule Vera module, so I didn't have to pay additional for that integration). I'm only controlling one Vera/Z-wave dimmer light with iRule, however.
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You should check out Zipabox from Zipato also, it is rather new to the market and not all that developed yet, but looks really promising. I'm also surprised that you don't have Home Center from Fibaro on your list!
Another thing to look for is KNX compatibility. It is a widespread standard for smart home integration and supported by many electric hardware manufacturers all over the world!