Vom Tal Der Schatten is pretty good as far as I know. My friend and breeder Cynthia Tidmore, uses some studs form VTDS. In fact the sire of my pup is VTDS male.
You can also check into Germelhaus.
URO3,UCD Aleshanee Windridge "Kayos" CD,TDX,RE,CGC,HIC,TC
PTE,AG2,AN,URO3,UCD Xtra!Xtra! V TeMar "Havoc" CDX,GN,RE,CGC,HIC,TC,BH
UACH,URO1 Tidmores Rising Star Lydia "Mayhem" CD,BN,AX,OAJ,NF,RE,HT,TC,CGC,
Lucky, Wolf, Max