I realize your post is more than three months old, but I just registered here so I could thank you for writing up these reviews.
I just received my own ES-Q3 set, which I bought for the same reason as you - price and a high number of favourable reviews, and was blown away by the price:quality ratio. I was wondering if there was any internet buzz about these headphones, so I Googled and came upon this post.
Because of your review I just placed an order for a pair of ES900i, and having heard the ES-Q3 I doubt very much I'll be disappointed. Looking forward to trying them out with the Jays app.