Just so you know, alot of Periphery/Meshuggah's stuff is deceptively in 4/4, they're more into the recurring rhythms.
I learn just by listening and imitating, but I developed my own sorta practice method for 5 and 7. I missed one of the steps in the progression when I wrote this up but this is how I practice placing bass drum notes in 5:
http://i125.photobucket.com/albums/p61/spazzzo/Fives.png
Some other bands to listen to are Planet X, King Crimson, Oceansize, Karnivool, Porcupine Tree and 05ric.