Edit: Reading comprehension fail. Didn't realize you had to empty piles.
1590 in 11 turns.
http://councilroom.com/game?game_id=game-20110525-132002-9918d98b.htmlI did this a while ago, when I was thinking about a similar problem myself. In theory, the same deck with Chancellor + insane luck instead of Chapel can cut the number of turns down by about 3, I believe. I don't think it's too hard or lucky to get something like that - you can see that my first 7 turns aren't actually that fast.
Anyways, so I revisited this today, after seeing this thread. Here was my result, which took under an hour:
http://dominion.isotropic.org/gamelog/201207/23/game-20120723-225820-21c18aae.html990 in 10 turns! ONE. MORE. BUY. And I would've had it in 10 turns.
I messed up at the very end of turn 9, by playing Ironworks for KC+Ironworks+Ironworks instead of KC+Ironworks+Council Room (like I had been doing). Then I would've played an extra buy on that turn, and also had an extra buy on my last turn. So I definitely could've had it in 10 turns. I had actually realized my error then, but didn't think it would matter... Edit: and, I could've done better at other points too, like with my KC and TR order.
Regardless, this strategy is really good. The key is turn 6. You should aim to have the same deck I did at the end of that turn. Restart as soon as you can't. You can get that lucky about every 25 times, by my rough estimate. After that, you need much less luck. Have fun using my method (and variants) to beat my score now! Not that motivated to play this deck any more times... Someone else can get the 1000 in 10 turns... I promise it's not that bad!