Though I don't own one now, I have to say the best out of the box sound and styles I have used are from ketron's sd series. I haven't looked at the audya, and won't until I can better justify the cost and they can better demonstrate reliability.. My friend's T2 sounds fantastic, but after 8 years has tons of "personalization". As has been said, it's a personal preference. I watched the recently posted PA600 vs PSR750 video and have to go with the Korg there. Both Pa3X and T4 have there good and bad to me that make it close. You have to go with your instinct, and first impressions do weigh heavy. Let's face it, out of the box is the first thing any potential buyers hear and what sways them initially. I did the same thing ,Having the BK5 for only 1 day before going Korg.