Fans/Controller question

[4thAttempt]

I'm about to take the plunge and buy a new system which will be built around an Antec P280. This case has 3 'DuoCool' fans as standard (2 top, 1 rear all exhaust) and space for an additional 4 fans. There is also an onboard fan controller offering a choice of 'Lo' and 'Hi' speeds for the standard fans.

Questions:

• Could I replace the 2 top fans with some quieter fans?
  
• Could I then add 2 quiet fans to the front and then control all 4 fans via a fan controller? Any recommendations? Is this one any good?

I'm already intending to replace the rear one with an Antec h2o CPU cooler as I'm hoping to keep the noise levels down, is this a reasonable way to do it?

 

[4thAttempt]

Thanks for putting my mind at rest. I was thinking of Scythe Gentle Typhoons but the Akasa is apparently fractionally noisier whilst being cheaper and moving more air so that's a benefit