I am planning on creating a [RGB LED POV globe](http://leyanda.de/light/povglobe.php) only physically larger then that one.

I am planning on using 64 RGB LEDs, requiring 3x pins per LED for a total of 192 outputs. Obviously I am going to need some shift registers. I have looked in to [74HC595](http://www.arduino.cc/en/Tutorial/ShiftOut) (8bit) and it would require 24 of these chips to handle all of these LEDs. 

I am planning on putting these shift registers in series with 6 per channel from my micro-controller. 

The 74HC595 has a switching frequency of 100 MHz.

I been told that I will need to spin the Globe at around 1500 RPM (25 per sec) 

The plan is to use a [Arduino](http://www.arduino.cc/) for the micro controller but I am open to suggestions. 

My questions are:

* Is there a better suited chip then the 74HC595 for this project?
* Besides the Arduino is there a better suited micro controller for this project?
* I don't want to power the LEDs off of the micro-controller So I am going to need external power. How would I go about doing this?
* With 6x 74HC595 in series, How fast could I switch all of the LEDs colors on this channel?
* With 12x 74HC595 in series, How fast could I switch all of the LEDs colors on this channel?