As a pure budget play, I agree with the recommendation. However, longevity on these chips are an unknown at this point. If you're cranking up the voltage beyond the recommended long-term 1.35v limit, you may be limiting the life of the chip. The 1.45v mentioned by AMD is not a long-term recommendation, but the maximum the suggest it can sustain, shorter term, without bricking. I guess if you can OC it to 4GHz @ 1.38v, that might be okay, long term, but from the various reviews I've seen on the 1600, the voltage required to get to the magical 4GHz varies greatly. In many cases, some reviewers were pushing the chip up to 1.48v to get there - many others are 1.4v or higher. While this may not end up being a big deal, I don't normally push brand new silicon past recommended long-term voltages (technically, you can invalidate the warranty, as well).
For me, I'm looking at getting the 1600x, as I don't want to OC it for the first year I own it (all bets are off after this

). I want a chip that, out of the box, gives me the performance I'm looking for. If I have to OC it out of the box to get what I need, then I have the wrong chip for my purposes, and should be looking at the next step up. If that costs $30 more for the chip, and the cost of a new cooler, so be it. At $249, it's hardly a super-expensive chip. Still a good deal when comparing to Intel's current 6 core offerings.