How's my play here - $109 Hand

Take a look at this line, if you will, and let me know what you'd differently up to the Villian's all-in and afterwards.

Thanks,

BrassMofo

NL Texas Hold'em $100 Buy-in + $9 Entry Fee Level:3 Blinds(25/50)
Seat 1 is the button
Total number of players : 7
Seat 5: W ( $1650 )
Seat 1: Hero ( $1805 )
Seat 10: R ( $1825 )
Seat 2: S ( $910 )
Seat 4: P ( $825 )
Seat 9: M ( $2030 )
Seat 8: Q ( $955 )
Level:3
Blinds(25/50)
** Dealing down cards **
Dealt to Hero [ Kd Ts ]
W folds.
Q folds.
M folds.
R folds.
Hero raises [100].
S calls [75].
P folds.
** Dealing Flop ** [ As, Th, 4c ]
S checks.
Hero bets [125].
S calls [125].
** Dealing Turn ** [ Qs ]
S checks.
Hero checks.
** Dealing River ** [ Kh ]
S is all-In [685]

Hero?

[lastchance]

I raise slightly more preflop, but otherwise, it looks fine. River play is hard though, guess it depends on reads.

Ah yes. My note on this guy was that he "calls a lot preflop".