what are you talking about? 187?
Anyway, Heavy Throttle and PDM are Very reputable....I haven't really heard anything about Porject Siliva though.
Also HT's price that you gave includes front rear PDM's are only front. Also, HT uses Goodridge brake lines which are very good. But both are going to be quality stuff....
EDIT: woot! 500th post

I need to get out more...