I'm not that into plaques myself for Poker game use .. They've never seemed to really be any part of Poker in the USA, the WSOP, Vegas AtlanCity, etc .. They were historically more associated with high end continental Europe Baccarat type games ...
I'd be okay for using them as a Bounty, Buy-in, Prize marker or somesuch, but I'd much rather have Chips in 20K, 25K or whatever needed denom ..