Nah don't cut out the front, just make some blowholes in the side of your case. Much easier, much neater, and makes for killer cooling.
As for the above posts, I agree with the others, the Sunons are the way to go with 80mm fans from NewEgg, the YSTech and Sanyo Denki for 120mm are good as well. The Sunons are a nice mix of performance and sound, but if you want more CFM or less noise, the other sites like 2cooltek, sidewinder etc listed above do give you a much better selection at a slight premium. I'm using 4 80mm Sunons (2 front/rear, 2 side blowholes) from NewEgg, and my system is still very quiet as my loudest fan is my 80mm Delta on my Pal 8045.
Side and or top blowholes are a fun project and allow you to get better airflow through your case rather than just trying to push more air through the front and back. Also, an easy mod for the Enlight 7237 is to cut out the front and rear grills with either dremels, jigsaws, or even metal cutters (non-mechanical) and then use a drill to enlarge the holes in the front bezel. I would definitely replace the front fan and put a fan in the rear as well.
Chiz