I think that some there are no such big difference between genuine, USA's L-500 serie and SH-13... I tried once one inpudent expensive Gibson LP Custom through amp that have had only clean chanell - sound a little better than classic Strat! :rolleyes Then I used Marshall JCM900 SX-L 2100 and with a little help of double gain this axe grow like a tiger, even her stock PU are with less output than mentioned three PU; so, I think now that all little difference in presence sound of most powerfully PU could be solved by gain and other controls on good amp.
Maybe Randall "stink", as Dime perhaps said, but I just was visitor on concerts and to me it sounds good.
Finally, I presume that any PU with output higher than T500 in Gibson would be fine ;)