Upgrading to an external Phonostages for my system


Here is my system...

Harman Karman HK990
VPI Scout turntable with a JMW-9 memorial arm and an Ortofon 2m bronze cartridge (mm)
Revels F52’s
SVS PB-NSD subwoofer.

Not schooled on these components at all but I’m in the process of researching them. I know it’s important to match the tone arm, and cart to it. What about the connects?

Someone has suggested a used JD9mk11, another suggested a used Ear834P.

Any suggestions?

Thank you for your input.

meambler
Much good but conflicting advise above, so I'm not going into a specific recommendation, but want to raise a couple of concerns that you want to address with whichever you choose.

- Low level phono signals are much more susceptible to environment noise from radio frequency interference(RFI), EMI, etc. If you live near radio or cell towers, etc. fighting noise is often a huge battle with phono playback. Solid state phono stages are generally much quieter than tube in such environments. Many tube-aholics have concluded that even with tube amps & preamps, the most practical solution is a solid state phono stage. Tube phono stages require the lowest noise tubes and often carefully matched pairs(i.e. often rare, expensive or both)

- Matching of each of these is important, so read up!:
a) tonearm compliance with cartridge
b) cartridge output with phono stage gain
c) cartridge impedance loading with phono stage options(or lack thereof) 

This stuff doesn't come easily without much study, so take your time or find someone you trust who can guide you through it. Most of all, trust your ears and try to listen to as much gear as you can if opportunity allows. If not, go slow, buy used so depreciation doesn't kill you, and then treat your purchases as long demoes. Cheers,
Spencer
Another vote for the herron. I too have heard nothing better at any price. Some that may be just as good but nothing better. If I were looking in the price range you were I would get a bottlehead Eros kit. That's what I would buy if I didn't already have a herron. The kits are super easy to assemble with a support group if you need help. I bought a beepre preamp for 1300$ and with a few mods it is the best I've heard. It replaced a 7k retail vacuum state which is well regarded. Plus the pride in ownership cannot be overlooked. And you will learn a little on the way. 
So I made a decision and picked a Herron VTPH-1 mm. I took your advice bpoletti and found one at a great price. I was considering the Manely Chinook, Allnic -1201, and the sunderland 20-20 but for the money I think I made the right choice. Lot's of anticipation here!

I'll let you know how it sounds once I get it into my system.

Thanks to all of you for your insightful suggestions and advice.  

Audiogon forum is only as good as those that participate and you guys represent extremely well. 

Thanks

Great choice!  Please keep us posted on how it sounds when you get it all set up.  Enjoy!
Update

I've had the Herron VTPH-1mm in my system for about a month and a half. The improvement of the overall sound over the Harman Kardon on board phono stage was immediate and dramatic. (Not that the HK phono stage was bad.)

I'm very happy with this purchase… the cost to sound improvement value ratio is excellent.

Now onto the next step in my search for music listening nirvana.