ifrflyer,
I made the same transition last year. I had one set of BDUs where the EGA was faded to the point that you had to get within two feet of my pocket to see it. That was the pair that I wore in the field. After that, I did go ahead and purchase two more sets for everyday ots wear. Being a flyer, that's a lot more BDU than I'll need for a while.
On that note, yes, I said "purchased"; you'll buy everything. There will be no assembly line that you walk through with your seabag open while things get tossed in at 11:30 at night. (Ah, the memories) So, if you want to get a leg up (sts), go ahead and start hitting the uniform shop now. The OTS web page has a list of exactly what you need. If you show up with nothing but a credit card, you're golden. www.airforceots.com has this and a lot of other unoffical, but sometimes usefull gouge.
SF.