have i lost the plot or is this the obvious move?

[asswasp]

I think this is a simple hand, but I've had a terrible run playing 6-seat tournaments recently so I've started doubting my abilities:

$50 6-player tournament (top 2 spots pay 65%/35%) down to 4-handed with 50/100 blinds. I have 2200, villan has 2700. Blinds have about 3500 each and are playing very tight. I raise to 400 utg with 8c9c. Villan (button) thinks for a while then calls, blinds fold. 950 in the pot. Flop comes Qc Tc 5s, I go all-in for 1800.

I almost want a call because I want those extra chips. My reasoning is that (a) all-in on the flop is hard to call if he's missed it (though high cards make this a bit dubious), (b) if he calls I'm unlikely to end up drawing dead, (c) I want a stack of 4550 chips, (d) winning will cripple this player (he'll have 500 left) and quickly make it 3-handed.

Or I could go out in 4th place.