Should i lay down AKs here?

[flo]

Party Poker No-Limit Hold'em Tourney, Big Blind is t100 (8 handed) converter

MP1 (t340)
MP2 (t1070)
CO (t580)
Button (t1650)
Hero (t1290)
BB (t1425)
UTG(t495)
UTG+1 (t1150)

Preflop: Hero is SB with A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img].
UTG raises to t495 (All-In), UTG+1 raises to t1150 (All-In), 4 folds, Hero?

UTG played some crazy hand, i give him a big range of hands. UTG+1 played alot tighter than UTG.

My decision and reasoning in white below:
<font color="white">UTG is very loose, he already made moves with bad hands, so i'd call him anyday with 2.x times his stack. UTG+1 played tighter, he surely has some good hand. But why did he move all-in? I think he maybe did that because he wanted it HU, so nobody comes along. Problem: he could have KK or AA, too...
I folded, and ended 5th in the tournament :/</font>