Hmmm, no replies in several months? Here is my experience if anyone still cares!
I presently have a AcousTech PH-1 phono pre and decided to check out the Pro-ject phono box rs.
My stuff. Music hall 9.1 mmf, denon 103r cart, bat vk-30 with internal phono card, MF 308cr amp, b&w 803s, more...
I was using the internal card in my bat and liked it but had a chance to pick up the AcousTech ph-1. Much improved sound, quiter, more stable soundstage, very nice.
I borrowed the pro-Ject phono box rs and auditioned - it and it blew my AcousTech away. Easy to set up and very versatile. Even quieter, more inner detail, no etch or glare, great at low volumes, it really is well made and solid. I will be buying one as soon as I can sell my ph-1.