Thanks a lot bro. And I definately don't mind... we all represent Lexos, right? lol. iForged wheels are awesome buddy. They cast the wheels to fit the GS perfectly. They have two and three piece wheels. I love the contrast on the lip on the iForged staggered setup. The lip is really thick... amazing in person, really.
To answer your questions,
I installed the Tanabe NF210 lowering springs. I believe the front is lowered a mere 1.3 inches and the back is lowered even less, only 0.9 inches. But let me tell ya man, with 20" wheels, that drop is P-E-R-F-E-C-T. I can't begin to tell you the amount of compliments and questions I get because of the lowering and wheels themselves.
I ordered the wheels from www.d2autosport.com It took about four weeks from the actually ordering process to me putting them on my car. They told me it was gonna be 5-7 weeks to get them... it was a great early surprise. They actually custom make the wheels to fit your car. They were great... very professional, courteous, and best of all, they were prompt with everything. I highly recommend them, they really know what they're doing when it comes to modification... and they've done a lot of work Lexus vehicles.
Every once in a blue moon, it'll slighty rub on the top of the front two tires if I'm driving 70+ mph going over a big dip on the highway. I've had the wheels since mid-December, and I can probably count the number of times that has happened with my fingers.
If you do you decide to get wheels, whether they be iForged or not, take it from me man, contact Derrick @ www.d2autosport.com, he'll show you the ropes for everything concerning any Lexus.
Well, I appologize for writing a damn thesis on the subject, lol. I hope that helped somewhat. Let me know if you have any other questions buddy. Good luck with everything.
-Niloy