Howdy all. I presume what I'm discussing below is possible? Got an iMac 2 weeks ago, has Snow Leopard. Took my music, photo's etc from my old mac and put it on the new one. no issues. So it's really "clean". the only 3rd party programs are Handbrake, RealPlayer and Flip4mac. I have the redemption code for Lion and am dying to try Lion out but obviously am hesitant reading the issues people are having. Can I therefore partition my HDD and clean install Lion onto that partition to see if it is OK thus keeping Snow Leopard in case I hate it on the other partition. If Lion is OK, I can then just manually move my stuff over from Time Machine (external HDD) afterwards. Now, if Lion is up and running fine and I no longer need SL, can I simply go into Disk Utlity and erase that partition? Without affecting Lion? Thus going back to one single HDD partition. Also to do the clean install I plan to burn the Lion install on my external HDD and use that to install. I presume that's OK?