there are a lot of variables to consider...and really the suspension setup depends on the car.
i'll try to answer each of the questions asked...first being the front sway bar.
currently i'm not running thing in the front because the dx came without one. now with front wheel drive cars theoretically its best to have the rear end stiffer than the front. hence the myth that front sway bars aren't good for auto-x. well, the civic type r gets a 26mm front sway bar and i'm sure it would do very well at an auto-x. it also has a 24mm (i think) rear sway bar which would lead a lot of people to think the car would push a lot. (in other words...not turn as well...kinda like pushing to the outside of the turn as if you were entering too fast and couldn't make the entire car rotate) well i cannot speak for honda engineering when they designed the civic type r but i'm sure there is a reason for this setup. you have to factor in the weight of the car, the stiffness of the springs and the size of the sway bars along with the power of the motor.
for my setup, i have somewhat soft springs (relative to other auto-xing civic hatchbacks that are competitive) with only a 22mm rear sway bar. in the future, i'd like to get extremely stiff springs (compared to what i have now) with rates probably around 450-550. i'll go with 450 up front vs 550 in the rear or like 400 front, 500 rear. the stiffer the rear springs, the better the car turns. now obviously there are certain compromises that are made when having rear suspension that stiff and its ride quality. plus, koni yellows lose effectiveness when the spring rates approach 500 so i'll need to get them revalved.
as far as auto-xing...i'm still learning what setups work and how the hatchback's weight distribution vs suspension works on different courses.
a friend of mine named chris (
www.b18c5.com is his website) has a civic with a very nice setup. he has racing gear coilovers (2400 for the set) with a stock front sway bar (his car is a 94 civic si hatch) with 25mm rear mugen bar. his rates are like 12k, 10k which comes out to like 500-400 or 600-500 in american rates. he says the stiff rear sway bar compensates for the stiffer front springs allowing for the car to turn as well, without having as much roll considering the majority of the weight is centered over the front two wheels. now again, this setup works for him and he runs times that would put him in the top 10 in the country if he raced at the auto-x nationals. basically, i've seen him beat mark daddio (6-time national champion) on certain days where the course lends itself well to his car.
so thats about all i can tell you, for my setup i like the rear sway bar without front, although i'm thinking of getting a bigger rear sway bar and 21mm front sway bar. again, it all depends on your setup...