I hope you don't mind if I comment on this. When you chose to get two TV36-Neo's, I was excited for you, and I thought that you had made a nice conservative, middle-of-the-road choice. I also knew that you were knowledgeable enough and experienced enough to know what you wanted to do. So, I liked your choice.
But, that was before you said that in your heart-of-hearts, you really want the iPal's. Different people put a different amount of emphasis on their audio components, and are more or less conservative in their willingness to spend money. To some people, this is just one of many hobbies, and to others, having what they really want in their systems is very important to them. I fall into the latter category, and I think you do, too.
If you have set a firm budget for yourself, and you really want to stick with it, or if the $800 difference is going to get in the way of something else that is important, then the decision to compromise with the Neo's still makes perfect sense. But, if neither of those things applies, then I think that you should buy the iPal version. I don't think there is any way to be sure whether you would have noticed audibly significant differences between the two versions, but if you really want the iPal's, in your heart-of-hearts, then you will always wonder.
I agree with Dave that, in the big picture, an $800 difference is negligible if it allows you to have what you really want. FWIW, I practice what I preach in that regard. I don't like to waste money at all, but I do like to get exactly what I want, if and when I can. So, I'm not just giving you the standard bit about enjoying watching other people spend more money. I think I know you well enough to believe that if you don't get what you really want, you will still be second-guessing yourself a year from now. I hope you don't mind me jumping into your business a little bit here.