The Pro-Ject Speed Box'es work on the Music Hall TT's. Pro-Ject makes the Music Hall TT's. As for speed boxes in general, the SDS for my VPI made a big difference in the sound. I would get a Speed Box if I was purchasing a Pro-Ject or Music Hall TT. The Speed Box is a lot less expensive than the SDS.
One of the Pro-Ject TT's is currently selling as an SE Edition with the speed box. It may be a little pricey for some at around $1K minus cartridge. It does look nice though.