Doing the Louvre yourself, with their audio guide, gives you the flexibility to move through at your own pace, you can pick the art you want to know more about.
Rick also has an audio guide, sort of like him taking you around and showing you what he thinks is most important, in a limited amount of time.
However, because the Louvre is one of the largest museums in the world and would literally take weeks or months to see it all, recommend you familiarize yourself ahead of time with where, in which wings and floors, the things of most interest to you are located. For that you'll want to spend time won their website and/or with a guidebook. That will save you time and keep you from being overwhelmed by the magnitude of the place.
What I have done is get the Paris Museum Pass and walk around for an hour two, then take a break in one of the food venues in the museum, then go back to the art for another hour or two. I generally have the Paris Museum Pass, which would allow me, if I wanted to, to even come back on another day (for free), as long as the 2nd visitation is within the time period of the Paris Museum Pass (2, 4 or 6 days).
I think Rick's Paris guidebook also has a walking tour of Montmartre, if you want to do it on your own.