Hi there

All renders looks awesome,still i would suggest try and download this EZDome

http://snarlygribbly.org/snarlyspace/ezdome.html

or BB EnvSphere which works like in FireFly or SuperFly

https://sites.google.com/site/bagginsbill/free-stuff/environment-sphere

With this you can use very easily HDRi and mostly I use above website for HDR which I posted and regarding my settings for SF,please download too EZSkin which would help you with better skin

http://snarlygribbly.org/snarlyspace/ezskin.htm

Hope this helps

Thanks,Jura