I suggest you the Soloist which is surely the best sub 1000$ amp on the market today.
When I tested the T1 one month ago, I was completely blown away. I found myself smiling while I was listening to song that I knew for ages now. Usually I have chills but there I was happy to ear the T1 shine with the Soloist and rediscover my favourite songs !
For the HD650, they are stellar, I've received the LCD2 one week ago and I was not disappointed in the HD650 at all compared to the LCD2 with the Soloist.They are less detailed and transparent of course but they are punchy and dynamic and not veiled as some can say
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I'm thinking that my search for an desktop amp is over now with the Soloist. You can drive almost every can on the market with it, for relatively good price and it sounds awesome. You can't go wrong with it.