I fitted the front ISTOY165 Focals (mid and tweeter) and it improved the sound significantly over the stock JBL speakers. I enjoy listening to music and I couldn't live with the standard system. One of the bolt holes in the mids needs slightly elongating to fit correctly (just use a drill).
It was easy to do, just takes time. Removing the A pillar trim (airbag connector) is fiddly the first time, but there are plenty of guides online. Removing the door cards is simple.
Example of a front door install from 4:40 here: