Only one, only one - the Lee Oskar range. About £20 on Ebay, any key (Low F IS really nice) and tuned to about 442, so they really sound bright and punch through at sessions. Better, clearer than Hohner, and last longer. I used to play super vampers, marine bands etc. but the Lee Oskar knocks them all out. I'll never play a wooden combed harp again! Great for vamping or blues. Also, you can buy replacement reed plates for about £12, which are easy to fit and gives you effectively a new harmonica for almost half price.
The only sad bit is--- they don't make a chromatic. But if they did, ti would be a belter!