Noticeably reduced performance with A/C on. Also squeaky center console/vents.

[autoque]

I have the 3.0.
During the summer while using the A/C, I could feel the engine's lower power ouput. Overtaking a moderately accelerating car, I had to use caution. But with the A/C off, I can feel more power and responsiveness.
I know the A/C steals some horsepowers but do you notice the difference like I do? Something to take to the dealer for?

Also with the A/C on, lots of squeaks come from the center vents and console. This is so very annoying! So much squeak and the noise is made again when I'm taking moderate, harder corners. Any solution for this?