Chris, I see you've participated in this thread:
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2614758#Post2614758.
Let's go back a square or two.
Approximately eight or nine years ago reports of camshaft galling in k-series engines began to show up on various Honda boards (see, e.g., ephatch.com; Honda-tech.com; vtec.net, etc.). (You also can Google "Honda camshaft galling" and find similar reports.) It was never resolved whether the cause of the problem was metallurgical, poor maintenance, abuse, high mileage or a combination of those factors and others. It wasn't a cronic problem, but there was enough concern that people took it seriously. Out of this was borne the advice/recommendations to run the same weight oil that Honda recommended (and still recommends) for its higher performance engines, 5W-30. With time, the problem seemed to abate. Whether this was a result of Honda's efforts or the use of 5W-30 oil is still hotly debated.
In your case, however, your owner's manual "recommends" 0W-20 weight oil. (I put the quotes around the word "recommends" because, if you read the language in the manual, Honda's recommendation is really a mandate.) Honda (and other manufacturers) specify that weight oil in order to comply with CAFE and, thus, receive federal SULEV & ULEV energy credits.
So, if you are concerned about potential engine warranty issues -- as discussed in the thread linked -- 0W-20 weight synthetic motor oil is your only real choice. If, on the other hand, you believe what Trav has recommended in the past (and I'm not trying to put words in his mouth), there is no mechanical reason why you can't run a 5W-30 weight synthetic oil in your V-6 Accord as others are now doing and many more k-series owners have done in the past.