AKs on late position

what is the best way to handle ak suited after a raise from a tight player in Early positon?

middle-end stage of an nl tourney. Vilian is a very tight player. showed only good hands so far. Hero has a conservative image as well. vilian raises from early position 3 times BB.Hero is one seat before the button. everybody folds to hero. vilian has almost twice as chips as hero. but hero is in a very good state in the tourney. almost twice the avarage stack.
hero has AKh.
call? raise? if raise how much? what's the best action?


lets asume hero calls. player on the button callls after hero as well.
Flop ( 5s, 4h, 9h )
vilian bets 1600.
hero - call? raise? raise all-in? or even fold?
If we put vilian on high pair (QQ, JJ, 1010.)( AA or KK is unlikely because hero has AK) should we call? raise?

please see the example below:

NL Texas Hold'em Trny:16913786 Level:6 Blinds (75/150) - Thursday, October 27, 04:45:18 EDT 2005
Table $10,000 Guaranteed(497376) Table #18 (Real Money)
Seat 5 is the button
Total number of players : 9
Seat 4: Hero ( $5328 )
Seat 5: UFumbDucker ( $3785 )
Seat 7: Nitefoxx ( $840 )
Seat 8: lsunder ( $5993 )
Seat 2: newcreature ( $2639 )
Seat 3: FishWitChips ( $3040 )
Seat 1: fransau420 ( $1585 )
Seat 9: Vilian ( $9320 )
Seat 10: para01 ( $1177 )
Trny:16913786 Level:6
Blinds (75/150)
There is no Small Blind in this hand as the Big Blind of the previous hand left the table.
** Dealing down cards **
Dealt to Hero [ Kh Ah ]
lsunder folds.
Vilian raises [500].
para01 folds.
fransau420 folds.
newcreature folds.
FishWitChips folds.
dedor calls [500].
UFumbDucker calls [500].
Nitefoxx folds.
** Dealing Flop ** [ 5s, 4h, 9h ]
vilian bets [1600].
dedor ?

any comment will be very appreciated.