I'm interested in the Gram se preamp or maybe the Pro-ject se preamp. Anyone have personal knowledge or heard them? The gram gets alot of positive reviews. I don't think it has a rumble filter though and the pro-ject does. Seems alot of phono preamps don't have rumble filters. Wouldn't you'd have alot more headroom and less distortion with a rumble filter in the phono circuit?