Your both right i think, my only concern is the only reason i'm looking to move away from my C2D macbook is i'm starting to beach ball on sandvox and i've already upgraded the HDD to SSD so don't want to shell out more money to find i'm still beach balling for the same thingFor the kind of use you describe, I'm sure that 4GB should be adequate. There's certainly no harm in getting 8gb if you can afford it though. But I have a 2011 MBA with 4GB and run pro applications like Logic and Final Cut Pro with no issues. I would have gone with 8GB if it had been available, but I'm not sure if it would have made much difference.
Think your right, it would be worth waiting in order to be sure i'll be happy with it, i'm slightly short on the 8gb upgrade. my macbook is still chugging away and i have a workhorse of an iMac so i don't think i'll have any problems waiting.I went from a 4GB 2008 c2d 15" MBP to the 2011 i5 MBA and the speed difference was quite dramatic. The CPU seems to be almost twice as fast. I'm sure you will see an even bigger difference in the 2012 MBA.
But since it sounds like you might have nagging doubts if you get the 4GB, then why not just get the 8GB? I can't think of a reason not to, unless you just can't afford it.
You're not out of hope. There may still be time. On the "thank you for your order" email apple sends out, if you click on the "Order Status" link through that email it will tell you if you can modify the order. So give that a try before settling or sending the machine back.Really wish I had read this prior to yesterday when I ordered the 4 :/
Just realized this afternoon that it's soldered to the board and not user replaceable... guess I'll return my 4gb and order an 8gb when it arrives.