Best Preamp New or Used up to $3,000 ??

With your 10kohm input impedance on the DNA500 it need 2.2v for full output, very hard to get a tube or passive to work with this.

@dsper FWIW I know of a couple of tube preamps that have no problem with this sort of load whatsoever. 

Because an "active preamp" cannot increase the dynamic range any more than what source is giving, unless it has an inbuilt "dynamic range enhancer" (DBX and they sound s**t). It can only serve to reduce the dynamic range, because it's not "a piece of wire"  

I don't like DBX either for the same reason. But that's not the problem; what a good preamp can do is not mess up the relationship of the output impedance of the source with respect to the cable or the amplifier input impedance. For this reason a buffer without gain can often work as well if no gain is required.

IOW, a preamp does not have to increase dynamic impact, it simply has to preserve it, which many passives simply fail to do.

Its only taken digital designers about 20-30 years to come around to the fact that they need to put a good quality volume control in their gear. Because so many don't, this is a good reason for an active preamp. Additionally, should any other source be desired, like a tuner or turntable, a preamp is mandatory since those source don't drive a power amp to full output.

As the fabled "perfect" preamp "sound like a piece of wire" adding or detracting nothing which is what your doing now by going direct.

The problem with a straight wire is that many sources don't really provide an adequate means of controlling the artifacts of the interconnect cable and often have substandard means of controlling volume (the Oppo is a good example of the latter). A passive control is **not** a simple bit of wire- the effect of the control can be to reduce the efficacy of the output coupling capacitor of the source while at the same time effectively increasing the apparent output impedance of the source, thus reducing bass impact. Reducing impact is the most common complaint we hear about passive volume control systems.

@twoleftears
Its a bit hard to sort out from their website how their preamps work, but it appears that the balanced connections use transformers both for input and output.
If that is the case, then it might support the standard. This is because a transformer can have a floating input and a floating output, which is what is needed to support the standard (in particular the floating output). Part of the standard is the ability to drive low impedances, and its not clear from any of the information I've seen online whether that is possible, but a phone call could sort that out.

The Atma-Sphere MP-3 is a fully balanced fully differential tube preamp with a direct-coupled output. Since your Cary has a balanced differential input, the MP-3 would have a leg up over the others mentioned here, on account of the fact that while some of the other preamps on your list are balanced, the MP-3 supports the balanced standard while the others do not.
The advantage of the balanced standard (otherwise known as AES48) is that there will be far less need to audition the interconnect cables- the balanced standard was conceived to reduce or eliminate interconnect cable artifacts, and its very effective at that.

You can sometimes MP-3 preamps used within your price point, sometimes even with a phono section (optional).