I have used the infinity reference 6030cs as a perfect plug and play upgrade to the stock low woofers. You have to remove the OEM speaker from the basket by prying it out. Then you place the new speaker in the basket with some dampener between. The screw holes line up perfectly on Coco a 2006 and the back end stuff connected easily utilizing the existing connector.
The 6030cs seems to be a bit of an upgrade from the OEM.
If you are experiencing popping especially while turning this likely isn’t caused by bad speakers. I’ll do a write up of how to fix Range Rover L322 Audio Popping later.
They do not have a suitable replacement for mids. Tweeters will likely work but I have not fit them or checked the impedance although I’m fairly sure the tweets match as well as the lows in part because its all a harmon/kardon system. Everything should match impedance.