I've blown out A harps at a rate about 5X anything else. I play Huang Star Performers so I guess most of you can disregard this. I did buy an A LO and it has lasted me probably 3x as long as the SP and is still as good as new (I'm hoping). In descending order A, C, D. I use all keys, but mostly A, D, G, F, C and E. FWIW I've never had to replace my E harp and it's one that I play with very hard attacks (~ 5 years). I play 2nd and 3rd position.
Report on valved bending - my valved bends are not sounding as cheesy these days. Now they sound better than my overblows. Anyone who does both that could give a dissertation. Can overblows sound as good as standard draw bends when played by mere mortals? I'm certain that I'll get full-sounding valved bends and wondering whether to continue to try overblowing without buying Howard Levy's video.