If is mostly for street, I wouldn't worry about getting adjustable ones, JMO. There are several companies that make them. Some good ones are Maximum Motorsports, Steeda, and a few others I can't remember the names of.
IMO, I would get both adjustable if your car didn't have coil overs. But since it does I would just get the uppers adjustable.
The adjustable lowers would be for ride height which you don't need with your coil overs and the uppers adjustable for length so you can set the pinion angle for the changing of your ride height.