With my fog lights off and my imitation HID bulbs on, you can't really see them on the road if there is a lot of artificial light around because they are almost blue. To correct that I turn on my fogs with stock bulbs, and then I can actually see that my lights are on. If there is a lot of artificial light around you, then you shouldn't really need your lights, and if there isn't, then your imitation HID's will do the job.
As for the skirts, no, it wouldn't look weird with just the skirts and everything else stock. I think the back isn't worth spending money on to change, and the front could use a little work to make it look more aggressive, but they will do for now. I'd just put the skirts on and maybe get a TRD