TRS all the way. Actual non-China stuff.
I use Xentec. only issue i have is, every once in a while when its very cold out, one ballast (usually a low beam, sometimes a fog) wont come on for a while. Doesnt happen too often
I also use the Xentec brand.
I payed $30 for the kit and it lasted 8 months until one ballast went out. They also offer a 2 year warranty...I think that is the best bang for your buck haha.
I didn't have the best experience with there slim kit at all, a lot of flickering after just installing it.
Why not just go V-leds for the fogs?
I had xantec for 2 years and no issues on my 04 when I had it, now im doing LED's for the fogs the xantec don't really match the 5500k light almost all of it looks 6000k or higher. try LED