How do people get over 100k unbuffed dps? I just don't get it. On all 5 of my chars, my highest has 57k, and when I look for upgrades, even crazy expensive upgrades, I only see increases of damage around 3-5k. If I replace all of my items at that damage amount I doubt I would even hit 100k. Where are people finding these amazing upgrades to damage on items? I don't get it...even the highest DPS weapon I can find in the AH only has an increase of 23K....and we are talking the best of the best (500million), and of course it's a downgrade on life and protection for me. And the DPS seems to drop off abruptly after that first page of 100+ million gold items.
I can't even begin to understand how people hit 300k unbuffed dps...
It's pretty easy to get mediocre DPS upgrades now, since they've changed the AH to allow the tooltip comparison. Before you had to link the items in your chat and log into a game to see the true comparisons.
The main thing to remember is that once you hit a certain level of DPS (around 100k), you're relying more on LS and less on LoH, regen, etc. You have to make sacrifices in order to further your DPS unless you have egads of gold laying around. It's trial and error, but one way to really get an idea is to look at other people's profiles and see what they have on the same class that you're trying to upgrade. If you've played with people that seem to do well, find out what skills they use and equipment they have.
Another large part is to remember that the small upgrades all stack making a large difference in the end. There's a reason why people upgrade their gems to get that extra 4 str, dex, int. Because at the top tier, that amount of primary stat makes a pretty big difference in the grand scheme of things.