The PSU fan is blowing in.
Only if the manufacturer installed the fan backwards. Never seen a PSU that draws air in, as the fans on a PSU are to help cool it as well as draw warmer air from the top (when top mounted) of the case.
As for the rest the general rule of thumb is front and side fans blowing in, with rear and top blowing out. If you mount those side panel fans both blowing in and out all you're accomplish is a vortex inside that can and will likely affect any cooling benefit. It will also cause them to basically circulate whatever warm the out fans are blowing right back into the intake fan.
For the noise with the fans on the side panel, rubber or foam washers should help with that. Another option would be to take a cheap rubber backed mouse pad and cut it to fit the outside dimensions of the fan, with a hole cut in the middle the same diameter as the fan blades.