AK hand played strangely; interesting flop action

[Pokey]

<font color="blue">Here's a hand I played tonight that I found potentially interesting for the uNL crowd. Rather than my typical approach of talking you through it, I'll present it with reads but no comments. Later on I'll talk you through my thought process, but for now I'd like to let you folks hash it out.

Reads:

I have slightly more than 300 hands on each opponent, here.

MP is running 40/7 preflop and also has a postflop aggression of 3.

CO is running 32/20 preflop and has a postflop aggression of 3. He attempts to steal the blinds more than 1/3rd of the time and given how bad MP is, this could be an isolation play. I should also point out that CO is currently running hotter than the sun.

I'm playing a fairly standard TAG game, though a bit on the passive side preflop, running about 23/12. My postflop aggression is sitting at about 7 right now and I'm getting respect at the table.</font>

Full Tilt Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 6 Players - (LegoPoker Hand History Converter)

Pokey (SB): $165.00
BB: $100.00
UTG: $115.55
MP: $151.05
CO: $116.60
BTN: $49.85

Preflop: Pokey is dealt K[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/heart.gif[/img] (6 Players)
UTG folds, MP calls $1.00, <font color="red">CO raises to $4.50</font>, BTN folds, Pokey calls $4.00, BB folds, MP calls $3.50

Flop: ($14.50) 7[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/heart.gif[/img] (3 Players)
Pokey checks, <font color="red">MP bets $7.00</font>, <font color="red">CO raises to $35.50</font>, <font color="red">Pokey raises all-in to $160.50</font>....

<font color="blue">So: why did I smooth-call preflop? Why did I check the flop? After the action gets back to me, why did I push the flop? Were these good moves or bad? Was this solid play or just another case of Fancy Play Syndrome? What do you think of this hand?</font>