If you want to keep the leg strength advancing but the size with-in limits, than might try 3X3's. Even higher reps (20-25) can increase leg muscle size. Didn't mention about you leg biceps or calves but if they do need attention than now's the time to focus on them and just hold the size of the quads.
I have a problem finding paints that fit well (with a 36" waist), that allow room for my legs and calves. Even the fat boy/loose stretch jeans (no way with Levi's or Wrangler's) don't work. If your thinking of hugh legs than you might consider trying to buy a better quality pant fit ($$$) when the legs become too big. Platz, back in the day, must have had to have custon pants made or wore those BB'ing clown pants all the time. Good Luck.