i have the rtrs units, bmwbushings.com, and have no issues with them. they are much cheaper than the other units out there. i use energy suspension formula 5 prelube for all urethane bushings and have never had squeaking issues.
the press in ones would be a pain. you'd have to have them installed at the alignment shop, and if they screw up they have to pull the arms and press them out then back in again. the adjustables don't have to be pressed in, and you just need to loosen the nut and turn the bolt to adjust.