Best OS for Mac Pro 2006 vintage
I have restored a lost and found Mac Pro with replaced HDDs and RAM. It currectly runs OS 10.6.8 and starts up on a cloned new HDD from a cloned backup drive. I woudl like to improve its seemingly very slow startup and make more reliable as I am using this for the kids to learn how to use Aperture to organise and learn from their photography exploits. Questions I have and would like any advise on:
1) Is the fact that I am using a cloned drive a possible problem and should I do anything than backup to the setup?
2) What OS system could I best upgrade to to allow system to work well and provide upgrade benefits? ( we have of course bought an iMac running latest OS and would like to be able to share over network and do Airplay type things. )
3) Is it worth installing a Solid State Drive as startup to protect against accidental switchoff by the kids (8 & 9 years old)?
4) Can full HD iMovie projects be transferred between Mac Pro and iMac and visa versa? (if I can not upgrade to 10.7 OS)
Many thanks for any help on this in advance!
Mac Pro, Mac OS X (10.6.8), 2x2.66GHz 2GB RAM 250GB HDD