The stock fans on AIOs are typically not very good for static pressure, but Corsair's are decent enough, albeit loud.
Some good choices are as follows:
Budget- BitFenix Spectre Pro (Very basic build quality, made of mostly plastic, but solid performance for a dirt cheap price)
Mid range- Fractal Design HP-12 (Looks nicer than the Noctua, and has similar performance. Dead quiet, same as the Noctuas.)
High end- Noctua NF-F12s (The best, not much else to say here. Static pressure is good, whisper silent. Colors are offputting though, only comes in beige, or the LTT orange and black versions.)