I know it's been said many times yet I'll throw it out once more.If its only strength you seek look no farther than the RyJ Cazadores.......the only CC thats ever put me on my azz.
If it's loads of flavor I would not recommend the RyJ Cazadores at all.While it is strong you'll find much more flavor in the RyJ Exhibition #3,#4 or Churchill.If you like a cigar with a leather profile look no further than the RASS(absolutely the most refined leather profile I've ever found in any cigar).If you want equal amounts of strength/flavor(well balanced) in an earthy profile.....I'd say the Bolivar family rule this arena.My personal faves are the PC and the Coronas Extra.If you can find them the Punch SS#1 may just be one of the finest Habanas ever produced........loads of flavor with a nice little kick in the final third.
Cuban cigars may or may not be what you're looking for.I personally smoke cigars from all regions of the world with my faves coming from Cuba and Nicaragua.If I like it I smoke it......one of my new finds is a Sungrown Puro from Columbia of all places.Not only is it tasty,it's also priced right.
Ron