So, here's what's going on ... I received an e-mail from one of the invitational attendees, and allow me to share it in shortform:
Just noticed from an earlier mail from you that you have not yet gone firm on the points for the invitational. I'd like to put forward the case for using 1,500 pts, a' la the UK GT circuit. I'll keep it simple since this is a subjective matter and just about every point has a very valid counterpoint to it.
In a nutshell I think there are 2 main reasons for using 1,500. The first is logistical and the second is psychological/tactical.
1. Logistics wise its going to be easier to finish 1,500 point games within the time duration even if someone does try the slow setup / slow play routine...
2. Psych/tactics wise is that the game is different at 1,500 than 1,750 and 1,850 because 1,500 points makes players make sacrifices about their army selection. Guard is a great case in point - at the lower level people just can't have everything they want and have to decide if the manticores are worth more than the vendettas or hydras or if the psykers are worth more than taking Al-rahem... 1,500 will also get people out of their comfort level a little which I think makes for a challenging event.
In case you think I'm pitching 1,500 because thats what I play at I've not played at this level since 2009 and all the events I play here are 1,750 and up :)
Anyway, my two cents...
So, here are some "counterpoints" in broad reply (I don't have too strong a feeling on this yet)
1) 2,000 points is too large one way or another, I think; not everyone is qualifying at that level, and frankly that's pushing it for 5 games in one day
2) Less than 1,500 and higher than 2,000 are both impossible levels, and outside of the recommendations for a balanced game from the Warhammer 40,000 Rulebook. It actually suggests 1500 or 2000, but contextually, you can presume they mean "anywhere between those ranges."
3) 1,850 is my most firm thought at present; it gives you flexibility, room, but is a tad smaller and more restrictive than 2,000, plus it's at about the sweet spot medium between the various qual events, that range in size from 1750-2000.
4) 1,750 and 1,500 are pretty "small" in terms of army build flexibility; certain lists certainly come "more" into their own at these various ranges, though I think the codices themselves all remain fairly competitive (or, at least, in about the same spot on the curve)
Popular opinion is less important to me here than cogent, meaningful, constructive commentary ... also, negativity? Well, hopefully by now it's known how I feel about THAT.
Keep it constructive, and comment away; remember, the Invitational will be an extremely competitive field by nature, and the Renaissance Man and Tournament Champion each take home $1,000 cash.