With Lion out this summer should I just wait? I'm not in a rush but do need an upgrade. Been playing WoW too long in low detail and getting close to running out of disk space (500GB drive). I shoot RAW and have been managing by going back and deleting all the blurry pics. I'm already hooked on Thunderbolt and that Promise external RAID is going to be mine . With that said. What do I do with my trusty 2007 iMac, sell it, or crack it open and upgrade whatever I can on it? Is anyone else just waiting for Lion to make the jump?