my first analog setup , some advice please


Hello friends.. So here is the story
I recently bought my first ever analog setup , and little over a year ago i started my first hight end stereo system. I bought every component after a lot of reasearch and i’m really happy the way it sounds. So for my analog setup , i got a VERY good deal for a Pro Ject Xtension 9 evolution turn table , Van Den Hul DT II Special cartridge , and Pro Ject Phono Box Rs pre amp. I’m a little skeptical about the phono box, i asked my dealer if he things that i need to get a better phono box , and he said “ not as long as i have the Van Den Hul Dt II Special cartridge “
so.. Quastion
Do i need a better phono box ??
I know many will ask “ does it sound good ?“
and the answer is yes ! and i’m really happy with what i payed , but like i said , i’m new to this and i feel there is a lot of potential for my system..
the rest of my gear
dali euphonia ms5
edge nl10 amp
benchmark dac3 pre amp
ps audio p10 power plant
and all around good wiring

thanks

128x128dimitris7
As you are dealing with a dealer, which is smart in the case of a new analog setup, I would suggest asking him what he feels would make the most improvement in your system.  You might be surprised.  I was once convinced I needed a new amplifier, but my dealer showed me during a demo that the qualities I was looking for were better achieved by a preamp upgrade.  Or you could just ask for a loan of an upgraded phono preamp and try it at home.  
thank you @noromance ! to be more specific i bought everything brand new for 2,800 and thats the price that the turn table sells for. i will look into those phono stage’s ! thanks again 
thank you @chayro , my dealer suggested to  upgrade to the pro ject battery power plant for my phono ! 
Tell the dealer to let you demo a better phono stage at home. You are on the right track with the cartridge and phono stage being your weak links. The rest of the system is very nice. Cheers,
Spencer