I wanted a new iMac but If it doesn't come in July I'll have to break the budget and get a rMBP with a 27" external monitor. I can only afford the entry level with a 16 mb ram upgrade. How fast is this thing really? I would use it for photography but I work with film and scan to very large files. It's not uncommon for me to have a few files open in photoshop exceeding 2-3 GB with layers. I don't have a lot of files like the average digital photographer but what I have is big. Really a fully loaded iMac with ssd would be ideal but if this doesn't come with the release of mountain lion I'll look to rMBP Thanks!