My music is Gypsy Rhapsody and it could be great if you are looking for something more mature.. But it seems like it is a bit over used in some areas. I would look at anything by Bond. A lot of their songs make great floor music. Hope I helped!
I agree with B Gymnast try the recommended floor music thread and see what is there
Choosing floor music isn't easy. You have to choose something you like that you can show your personality off with. Your floor routine should show emotion as well as doing the tricks it should be a performance. Find the music that really speaks to you. Ask your coach what suggestions they may have for you. They do see you perform and should have a feel for what would work well with your style.
My DD who is a L7 working on L8 is looking at floor music too for when she moves up (hopefully after this season). She likes all types of music but she know her favorite are the more dramatic musics. So a Swing or lite and lively piece of music just wouldn't work for her even if she likes the music. More Dramatic music works with how she presents on floor.