Heres my train station that i used, I consider this high speed as its able to completely service a train in 15 seconds and send it out. While also being able to send out all the resources before another train comes in. Usually there's a train waiting to get in just as the other leaves. (I got hit several times while taking that picture, but it seems shields can stop a train if you have enough.)

This is my smelting plant, I didn't gear out with productivity modules as i had loads of resources shipping in, and I needed processing speed. The furnaces are filled with speed modules, while the beacons are filled with effectivity modules. This allowed me to process the incoming resources from my train station near instantly. (You should of saw it when i first turned it on, the entire system was clogged with ores.)

And heres my end game screen thingy. (I had a bad habit of hitting c which caused me to fire rockets at what ever I was building accidentally.)

This games awesome. I recommended it to several friends who also bought it, we are currently waiting for multi player. (When we get multi player i know atlease 6 friends who would instantly pick the game up to play.)