I guess that depends on how much you're willing to pay. After trying and failing multiple times to buy one at retail, I finally gave up and paid extra. This was about 6 months after release and people were still selling them for $800+. I got mine for $650. This is just about $100 more than buying it from the store if you add tax so that was my comfort level but everyone's threshold for this kind of thing is different.

One thing I stress to everyone, whether you go Xbox or Playstation, always get a system with a disc drive. It will always be cheaper in the long run. Having the ability to buy, sell and trade used games will outweigh the $100-$200 upfront savings of going digital. You can find used games online, at yard sales, thrift stores, just about anywhere and they're cheap all year. If you find 2 games under $10 and those games are $60 digitally, then the $100 disc drive paid for itself. Over the life span of the console, a console with a drive will actually be cheaper than a console without one.