For the difference in price the 3500 is a no brainer. I'd love to see Truthslayer do a dbt and consistently pick out the difference between the 2 because I don't think it's possible. Folks who make those claims tend to avoid proving them with double blind testing.\n\nPogre, my main concern would be in regards to reliability (longevity). (3500 )\nNow weather there would be an audible difference or not, I couldn't say one way or another. But sorry to say, the way the transformer is placed directly under the main board, can't be a good thing. And you can disagree if you like, but the heat sinks on the 3500 is also a joke. And that's my opinion, you don't have to agree with it. However I thought it was worth discussing, to give the OP something to think about.\n\nNow as far as your statement regarding a dbt, and picking the difference out consistently. I will never understand why some people think you need to prove what you may or not hear. If someone might be able to hear a difference or not, why should that matter to anyone else. It doesn't effect you. You never hear people say (the one's who might be able to hear a difference on something) to the ones who can't hear a difference, " I don't believe you can't hear a difference" \nThose kind of statements are what causes people to not even want to get into discussions about different products. For those who can't ever seem to hear a difference in different products, Great for them. It should make this hobby much cheaper for them. That's why I never dog anyone out for their choice of equipment, if it makes them happy and sounds good them. Well, that's all that counts.