I'm not overly keen on stand alone DACs any more. With the emergence of digital products like the Leema Elements DAC, the Audiolab 8200DQ and M-DAC, the Classe CP800, the Cyrus DACxp Plus etc (basically DACs with integrated digital or analogue pre-amps), I personally see less value in a DAC which is just a DAC. With an integrated pre-amp, you're cutting down on an extra run of quality killing cables, and those with digital pre-amps having the advantage of the possibility of keeping the original signal untouched.
Another aspect is that there are streamers emerging with on board high quality DACs. We no longer keep the Naim DAC on display, because of the value offered by the Naim NDX is better value for money - you get the £2100 DAC, but for £900 you get a high quality Naim streamer with a great iPad app.
Obviously your system is a little different as it is AV based and you already have a pre-amp, whereas I'm coming at this from a 2-channel point of view. But you did ask what I would go for personally 🙂