So, I've talked to progressive and you can buy the springs for around $35 each, direct from progressive, and switch them yourself. I bought the 13" HD springs because that's all I could find and will probably have to change them to std.
@1olbull has stated that he had the HD springs for awhile and switched to std and enjoys them much better. But he's less than 300 (I won't say what he weighs, but he can chime in).
BTW, I weigh 275 and ride with hardbags with some stuff in them most of the time.