I am equally pleased with the C2 woofers and tweeters in the front doors of my E53. No rattles detected.
The TR series JL woofers are doing a very respectable job in the E46 front doors and rear deck. A very tight fit to the E46 front door without cutting any sheet metal.
Speaking of rattles, I was tuning the E46 system (OE HK set up in sedan) with my upgrades yesterday and picked up a buzz/rattle in the HK subwoofer 6x9 on the driver side. I suspect it may be a fractured foam like I found in the 15 year old mid ranges and these factory 6x9s are the last OE speakers remaining in the car.
So, for $30 I have a set of Pyle PLSL6902 coming to make the speaker replacement upgrade complete. The factory mounting housing looks to be about 2.25" deep and these have a depth of 2.125" so really looks to be the right fitment.
Pyle PLSL6902 6"X9" Slim Mount Speaker 2-Way Coaxial W/ 1" Voice Coil & Tweeter 68888743082 | eBay
Mike