I PvP a lot (not that I'm any good) so my crits may not be as high compared to the PvErs, but I've had a few good crits when the situations are right!
Highest TV I've gotten on a player is about 49k, this is with both trinkets procced, Guardian up (extra strength), Wings, and Inq.! My mastery must've added about an extra 12k so that's a tasty 61k in one go :D. They must've been pretty undergeared though 'cause it's pretty rare to see crits that big in PvP, usually TV crits for like 15-20k :(.
With the same procs and stuff I've seen 43k HoW's on players too. Again, they'd have to be pretty undergeared 'cause it's not usually that high :P. Love it when I get lucky with RNG and can chain together HoW's and TV's with wings up!