After 304 hours of vanilla I'm looking to expand the complexity of Factorio. I've heard of Angels and Bobs, and more recently Pyanodon/SpaceX?
Are these standalone, do they work with each other? Is one harder than the other?
I'm not looking to increase the complexity as high as it can go, but maybe some new ores, some new recipes etc just to make it maybe double the complexity... can someone point me in the right direction. it's a bit overwhelming with all the different options.
I was a huge fan of Gregtech in the Minecraft world, and whilst I'd like to get to that point, for now, start small

So basically what I'm after is some added complexity (I don't mind grind at all), without being over the top. Once I've done that then I'll go full complexity

Thanks everyone!
Premier2k