I agree with Jimbo here.  I think that these historical charts in this thread provide us with a kind of weighted average of price representation that is either not existent or difficult to find in other places. 

If any person want to research into peaks of BTC prices of various exchanges and in various currencies on various days and even zooming in on those price peaks, then there are several resources to find that kind of information.

I also understand the reason for ovdsm's suggestion, and if Stamp is ultimately more accurate and reflective of overall BTC/Euro weighted price, then perhaps consideration can be given for that (or at least monitoring of that possibility).