I had some coust pads, I found them the opposite to what you said...good bite, crap hold.
Never used the Heatsinks, so can't and wont comment, but I have been using the LGM pads all year (yep, the same pad the whole year to those skeptics who say they don't last long) and they have been pretty awesome, good in the wet, good hold and reasonable bite (my setup is aimed at hold as the most important aspect, sacrificing bite)