You don't need 1k dps weps to hit 20k, I use two daggers. Also you might think "Dafuq, he only uses 750 dps 1handers!", dex is important really important and its fairly easy to get high dex on weapons. It gives you dps, armor and dodge. With those weps going from 1305 to 1380 dex gives me almost exactly 1k dps, my main hand dagger with 138 dex and 787 ratio is as good as a 920 dps (roughly) 1hander without it. But it also gives me the armor/dodge so use common sense, don't be slaves to blue weps.
764.2 dps with 138 dex, 123 int, socket (life on hit gem)
787.5 dps with 130 dex, 106 vit
With this http://us.battle.net/d3/en/calculator/monk#ahXgYi!XYd!acbZcZ
build I roll 20087.41 dps WITHOUT my buffs going 23100.52 with BoH's BW rune, 40780.99 with BoH and Blind running. I can demolish ACT I with it, I can fairly easily farm ACT II. I have not tried to farm ACT III though.
Here are my stats http://imgur.com/Tp6OP ( no buffs on)
Attack speed is vital, your goal should be to use a shield until your geared enough to farm with 2 1handers (daggers preferably). Attack speed of 2.2 + I've noticed gives you really good spirit regeneration (Without any on items). This allows you to spam your mantra and keep using other abilities as they pop.
Now, here is something important this build isn't built as a laser beam to mow down a single foe. Its massive AoE dps, sweeping wind is good, thunderclap is great but backlash is GODLY. Without healing mantra nerf I use the backlash runed evasion mantra alot, it does 88% weapon damage to everything around you EVERY time you dodge. If you've got 10 white mobs around you, then you just run in activate your mantra sit there with 60% dodge and watch them melt just from backlash. Since each of those mobs are attacking fairly fast you'll likely hit 6 or so times in the first melee round to everything around you. For farming its pretty vital imo, mix it with sweeping wind blind and thunderclap and you'll destroy everything in the 3s blind takes and if you don't go ahead and go immune and give yourself 3 more to crush them np.