I'll reply since I had trouble finding comments on the 7005 prior to purchase. First, I've found the 7005 to exceed all of my expectations. I use it with SACDs (and oppo 93) and movies but also as a preamp with my DAC.
I never listened to an SACD prior to owning the 7005 but I find the results impressive for multichannel orchestral. No fatigue at all. Dynamics are punchy to say the least. I've made a couple tweaks to the unit...upgraded the power supply fuses (3 HiFi Tuning Silverstars) and added damping pads to the underside of the cover. The remaining five fuses (analog outs I'm guessing) will be updated soon. In modes other than movies, I use the mode "pure direct" which shuts down everything but the audio circuitry (LED displays, video circuits, etc).
As far as tonal character goes, I would call it neutral but highly resolving. Prior to replacing the PS fuses, I would have called it warmer and perhaps very slightly less resolving. Now the term "clear as a bell" comes to mind.
My system consists of Vandy 3A Sigs, McCormack Amps (DNA-1/HT-1), REL Stadium sub and the oppo 93 used for digital outs only. Center is the VCC-1 and surrounds are some small B&Ws and enough to add the ambient effects. Interconnects are TRS Audio Free (Silver litz) and Alluvion (their prior generation and also silver). An Elrod EPS-3 powers the 7005 and an EPS-3S powers the main amp...various on the others (and by the way, the Elrod cords are absolutely amazing what what the bring to the game...on the amp it was like strapping a super charger on as far as dynamics went...I haven't experimented with cords on the 7005).
My DAC is an Assemblage 2.7 Platinum that just got a full upgrade from PartsConnexion in canada. They replaced the op amps with burson discretes along with other upgrades. This is an awesome dac and as a preamp, the 7005 works well (excellent micro dynamics and I hope those will improve once those last fuses are swapped). Can I do better in the preamp area? Oh I'm sure...but the 7005 as a two channel preamp is still very good but we know there is plenty better to be if one wants to spend the money. Me? I'm delighted. One comparison I can make is the enjoyment from SACDs (via dacs in 7005) vs CD (external dac). Lately I've had more fun listening to the SACDs and I think that says a lot. Some of that has to do with the quality of the recordings of course, the Pentatone SACDs are stellar. But some of my best sounding CDs sound equally good via the outboard DAC. I prefer the outboard DAC for CDs as it has a bit of a fuller sound, warmer sound and perhaps with better microdynamics but I haven't spent time A/B'ing the two in that mode.
I'm not sure how useful these comments are since I haven't heard the 8003. Some places will take the unit back within 30 days if you're not happy...which is what I did to reduce risk. Someone wrote somewhere this unit sounded as good as their krell it replaced...I chuckled...who knows.
Anyhow, hope this disjointed post helps...I haven't posted here in years but my ID is still active. Good luck.
PS - Audyssey is really slick for setup and channel balancing.