I have the Eurosport camber kit, lowered 1", and a 26mm rear bar. I also track and autocross, so I'd say if you push the car, there are gains to be had in the alignment. If it's just a daily driver, then get as close to stock as possible and call it a day.
If you decide you want to play with the alignment, a little toe out up front really helps turn in, but you don't want too much, or eats tires and can create mid turn understeer. I'm at .2 degrees toe out with a 245mm width tire. You can't adjust front camber unless you have camber plates up front, but you likely gained some negative camber by lowering. If you have stock rear sway bar, I'd say you want 0 to .2 toe in in the rear with -1.5 camber. If you have a big rear bar, you can add up to -1.8 camber and go towards the higher end of the toe in of my recommendation.