Upgrade MSB Link III to "Full Nelson" or ?

I currently have an MSB Link DAC III with P1000 power supply and am wondering if the upgrade to a "Full Nelson" version would be worthwhile. They're on sale now for $498. Anyone already make this upgrade or an upgrade to something else (under a $1000)? System includes NAD 116 preamp, Rotel RCC 1055 CD changer, Bryston LP 60 and Harbeth P3ES-2's. Thanks.

David