Looking for great violin CDs in solo.

Heinrich Ignaz Biber: Mystery Sonatas / Holloway, Moroney.

Bach: Sonaten & Partiten / Nathan Milstein

Brahms: Violin Sonatas / Itzhak Perlman, Vladimir Ashkenazy

Here's two solo, quite different from one another, the second being a bit more sophisticated in musical content and virtuosity. The first being rather stark and enjoyable renditions of Bach, which have been played better by others, yet nonetheless, this remains a favorite of mine and is very engaging in its presentation of these pieces (think violin coming from a deep, black space):

Lara St. John, Bach Works for Solo Violin

Vengerov Plays Bach, Shchedrin, Ysaye (worth it for the Ysaye)

Marco

Recordings of Violin and Piano (I'm unaware of any solo violin recordings) which I enjoy and would fit into your description would include -

Kyung Wha Chung "Con Amore" on London

Virtuso Vengerov on Teldec

Homage to Sarasate by Rachel Barton and Samuel Sanders on Dorian

Beethoven Violin Sonatas (Kreutzer & Spring) by Pearlman and Askenazy on London; and for something a little different

Rare Transcriptions for violin and piano transcribed by Saint Saens and Ysaye on Hyperion. The transcriptions of of a lot of music by Chopin and Saint Saens.

The Hyperion and Dorian CD's recordings are particularily outstanding from an audiophile POV, not that any of these are shabby. Some great playing and very assessible classical music here.