A8 and D8 are the ultra model from Yulong Audio - not for public sale but for interested parties, you may pre-order at very limited quantity:
Discussion about A8 and D8 is at this thread: http://www.head-fi.org/t/586153/yulong-sabre-d18-thread-reviews-impressions-discussion-full-review-added-2-5/510
Pre-order arrangements: (this is subject to change - see Yulong Audio Facebook page for real-time updates: https://www.facebook.com/pages/Yulong-Audio/326982077398065?ref=hl)
1) You may pre-order either D8 or A8 now with non-refundable deposit at the price of Sabre D18 ($699) and A18 ($899) before Oct 31st, 2012 (later than this I highly doubt the order can be added in as circuit board are made at one time only)
2) If you change your mind after paid non-refundable deposit but before Oct 31st, 2012, you can use the deposit towards any other products offered by Grant Fidelity - including other Yulong product models. After Oct 31st, you cannot change your mind anymore. Deposit is non-refundable so please consider carefully before you place your pre-order. No deposit is refundable as the funds have been immediately transferred to Yulong as confirmation of pre-order.
3) Final price will be confirmed by Yulong but Grant Fidelity guarantees that pre-order buyers will have the same final price as retail price published by Yulong in China, plus free air express shipping from Yulong Audio to your door (worldwide except area that we don't have contracted courier delivery).
4) Balance of the price after deposit is due before shipping. If no balance payment paid after 72 hours of ready-shipping notice by email, it's considered the buyer no longer wish to take delivery then Grant Fidelity has the right to resell the pre-ordered unit to other interested buyer and only refund the deposit minus reselling shortfall amount to the deposit payer once the unit is sold.
If you decide to pre-order, please contact Grant Fidelity through GrantFidelity dot com - contact us page.
Official Agent for Yulong Audio in North America, with worldwide reselling rights