How much gain is needed in a Phono Preamp for a 0.2 to 0.3mv low output moving coil?

I try hard to make a good decision, so I don't have to go thru a bucket of cash trying to get things correct. That is why I started this post. I read reviews just to get a feel for the products but hearing from everybody on Audiogon that have the same interest, means a lot. Sincerely thank you all.  I know the end result is my system and my ears. I have been told by many that synergy is important. Partly the reason I went with the ARC amp and preamp knowing they would mate well and when I want to upgrade they seem to have a good following. I had checked out the AT Art 9 in the last post I did regarding pre and power. I think they were the first to use a nude Shibata tip many moons ago. It seems they have come a long way. I checked the web for an Art 9 and they are no longer made. I saw the Art 1000 and figured it was the replacement for Art 9, but I quickly realized I was completely wrong.
Please keep the comments coming. As you can see I need help but i am getting there.

http://www.lpgear.com/product/ATART9.html

I just solved for this very situation.  Purchased a Dynavector 20x2L with 0.3 mv and my BAT VK-P5 pre-amp offered a max gain of 56dB which was not enough.  Replaced with an Avid Pellar at the 70dB gain setting which is pretty much just right for this cartridge's output.  

Lots of good suggestions in the last day or two here. 
I agree with the brief comment that a solid state phono stage will give you a lot higher chance of quick success. It hasn't been discussed much in this thread(but plenty elsewhere!) that low level phono signals are most susceptible to picking up RFI(ie. radio)/EMI noise. Tube phono more so. Go with a ss phono stage with plenty of gain and you will high probability of quick success without headaches.
The Art9 sounds lovely and balanced, great with classical, perhaps a bit on the sterile, detailed, cool side vs. Dynavectors which also are frequently mated with VPI arms and tend toward warmer, punchier, more relaxed sonic profile that appeals to many. Either is a great choice. Cheers,
Spencer 

I have a Dynavector 10X5 on a REGA P3 with the Manley Chinook Phono Pre,  45db is more than adequate for the 10X5! (this is my goto backup rig) I also have a Pro-Ject Xtension 10 with a Dynavector 20X2 Low .3mv and 60db is plenty for that cartridge as well. I use the Manley for both and switch cables around (when needed). I love both these setups, very satisfied.

Matt M