I have a Pro Ject 1expression turntable w/ortofon 2mm blue connected via a Pro ject phono box mm to my Marantz.I'm looking to upgrade the phono preamp to something better. Just feel its time to upgrade the pre amp have had it for awhile and want to try something new within reason. Looking up 250-500. to spend for a new pre amp but don't know enough about them as to sound characteristics etc. Small foot print is best for me.Also like the "warm" sounding characteristics if possible.So looking for opinions as to what to look for a new preamp.thanks