You really should list what your budget is. By saying the best, you are getting into some really expensive phono preamplifiers. (The ones I've listed below retail from about $5K up to about about $10K.) Also, do you want or require the phono preamp to run your cartridge in balance mode, hence do you want or need the tonearm cables to be terminated with XLRs? Also, you should state whether you can put up with tube rushing noise, (and the benefits of tubes), or if you wish to have solid state, (and lose the benefits of tubes). (I bring that up because the output of the Dynavector XV-1S is 0.3 mv, which is pretty low, and most tube phono stages will be stretched to their limits to provide the gain necessary for such a low output cartridge. Luckily you are not using a highend Allaerts with its 0.1 mv output - Ouch!!! FYI, I am not trying to frighten you out of using the Dynavector XV-1S, as I use it, (with my Basis 2001 and Vector M3 tonearm), and think it is an incredible cartridge, and possibly the last cartridge I'll ever own.)
Based on my experience and research, the choices I would recommend are:
ASR Basis Exclusive - A great phono preamp, that is actually two phono preamps, and has the capability of running even the lowest output cartridge. It is solid state by the way, and is set up to handle XLRs. (My favorite, btw.)
The Manley Steelhead - A hybrid phono preamp, that can handle most any cartridge, that still has the sound of tubes. Single ended only though.
The Einstein (The turntables choice) - Another great solid state phono preamp with lots of gain. (A friend uses the XLR version of this preamp with his Basis 2500 and the Dynavector XV-1S, btw.)
Lamm LP2 - A great tube preamp, but somewhat limited in its fleibility. Very musical. Single ended only.
Aesthetics IO Signature - A great tube phono preamp.
ARC PH-7 - A very nice tube preamp, but may not have quite enough gain, (it depends on your preamp's gain, as to whether it would work). Has the advantage of having a remote to adjust loading (and other features) on the fly.
Good Luck in your search.
Based on my experience and research, the choices I would recommend are:
ASR Basis Exclusive - A great phono preamp, that is actually two phono preamps, and has the capability of running even the lowest output cartridge. It is solid state by the way, and is set up to handle XLRs. (My favorite, btw.)
The Manley Steelhead - A hybrid phono preamp, that can handle most any cartridge, that still has the sound of tubes. Single ended only though.
The Einstein (The turntables choice) - Another great solid state phono preamp with lots of gain. (A friend uses the XLR version of this preamp with his Basis 2500 and the Dynavector XV-1S, btw.)
Lamm LP2 - A great tube preamp, but somewhat limited in its fleibility. Very musical. Single ended only.
Aesthetics IO Signature - A great tube phono preamp.
ARC PH-7 - A very nice tube preamp, but may not have quite enough gain, (it depends on your preamp's gain, as to whether it would work). Has the advantage of having a remote to adjust loading (and other features) on the fly.
Good Luck in your search.