I put these in the doors. The tweeters and the crossovers were a bit of a challenge, but nothing too bad. The mids fit perfectly in the door.
The Focal IC 100's are basic plug-and-play replacements.
If you search on eBay you can find any of these for roughly half price compared to Crutchfield.
The Focals offer very good sensitivity and provide the best soundstage I have heard in a 2 series. The highs are far less harsh than hard dome tweeters. Overall a very natural and accurate reproduction of any music you chose.