Good diet for an amateur boxer

Would this be a good diet for someone who is a competing amateur boxer. I'm 24 6' 215 and in a couple of months I would like to start competing again in boxing. I have altered my old diet, which you can see here:

http://forums.steroid.com/diet-nutrition/120587-enough-protein.html

I have included brown rice and eliminated steak and natty pb from this diet.

Well here it is:

1)Breakfast 5:15 am

5 egg whites
1/2 cup of oatmeal with splenda and cinnamon
Whey protein shake (1 scoop, 27.5 g of protein)
cup of green tea with splenda and a little nonfat carbcontrol milk
multi vit, 500 mg vit c

2)Brunch 8:30 am

Whey protein shake (1 scoop, 27.5 g of protein) with 1 tbsp of flax

3)Lunch 10:30 am

1 3-4oz. chicken breast with spices
1/2 cup of instant brown rice

4)Snack 1:30 pm

196 g of albacore tuna with one tbsp of full fat mayo
500 mg vit c

5) Pre Boxing Workout Meal 3:30 pm

1/2 cup of oatmeal with splenda and cinnamon
Whey protein shake (1 scoop, 27.5 g of protein)
1 medium sized red apple

6) Post Boxing/Pre Lifting Workout Meal 6:15 pm

1 3-4oz. chicken breast with spices and marinade
baked potato with pepper
1 medium sized red apple
500 mg vit c

LIFT 8-9:30 pm

Post Lifting Workout Shake

IMMEDIATLY AFTER MY LAST SET

Whey protein shake (1 scoop 27.5 g of protein) with (5 scoops) 57.5 g of Dextrose/carbs

7)Bedtime meal 10:30 pm

Whey protein shake (2 scoops 55 g of protein) with 1 tbsp of flax

Sleep 11 pm

I'll also be drinking 2 gallons of water a day.

As you can see I am unable to have a PPWO pro/carb meal because I get done lifting so close to bed time.

A couple questions:

1) Is this enough carbs to fuel me with energy for the day?

2) Is this enough carbs to keep me from losing weight and muscle and getting skinny?

3) Is this a good amount of carbs where I won't get fat?

Thanks bros!