iMac 2010 SSD Upgrade

Thanks for the help. I have the iMac “Core i3” 3.2 27" model. I knew about the extra sata port but not about the extra power. For mounting I will use velcro. And for the TRIM I will enable it using terminal commands (I know this can be done). I’m planning on installing Lion on it, would I still need to enable TRIM? In any case, thanks everyone for the recommendations.