Is running the liquid cooler radiator fan on 'exhaust" suicide?

I recently purchased a thermaltake case for my new computer, and the fan on the CPU is LOUD.
I bought corsair C80 liquid cooling system to quiet my system down.

The C80 Liquid Cooler unit has 2 120mm fans, and I know it should blow from outside the case to the inside so cool air runs over the grill.

I cant install the cooler fan to the open spot in the bottom of my case because the coolant hose wont reach. The cooler hose can only reach the rear fan.

I am guessing the best thing to do would be put the cooler fan in the rear as intake, then add another fan to the bottom as an exhaust. I would then have 3 intake and 2 exhaust, but I am destroying the "flow" of air through the case then.

I don't overclock and I'm not the kind of guy that gets excited if my CPU temp drops a little.

In summation- do you think this is the best way to do this?

TL;DR - my current computer case has a 'flow' of air from one end to the other. If I move the fans no longer have that 'flow'- is there going to be a significant penalty for me?

SPECS:
current

120 mm Fan
Bottom (intake): 120 x 120 x 25mm (available slot but i haven't installed it)

140mm Fans
Rear (exhaust): 140 x 140 x 25 mm Turbo Fan

200mm Fans
Front (intake): 200 x 200 x 20 mm Fan
Top (exhaust): 200 x 200 x 30 mm Fan
Side (intake): 200 x 200 x 30 Fan

case: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
cooler: http://www.corsair.com/cpu-cooling-kits/hydro-series-wa...
cpu: http://www.newegg.com/Product/Product.aspx?Item=N82E168...