You should vary your reps depending on the weight you are using look at:
My workout for chest day(with your 1 time max):
10x reps with bar as warm up
6x reps with 135lbs (a 45 each side)
5 reps with 155lbs (a 45 and 10 each side)
3 reps X 4 SETS with 165lbs (a 45 and 10 and 5 each side)
Then I would do chest press with dumb-bells: about 5-6 sets
Then incline benchpress: about 5-6 sets
Then I would kill the tricep with some close grip benchpress and pushdowns...
Thats my chest day for ya
As far as definition goes I would recommend doing cardio in between your work out days, stuff like cycling, jogging, swimming (DO THEM REGULARLY)
personally my week consists of:
SUNDAY: OFF
MONDAY: Chest all around, triceps
TUESDAY: 30 minute jogg, biceps
WEDNESDAY: Back, Legs, Shoulders
Thursday: 30 minute jogg, biceps
Friday: Chest all around, triceps
Saturday: OFF