Chappellet’s Cervantes is decent and in the mid 20’s. Had a Clos du Val recently that I enjoyed and also a Merryvale Starmont that was good (if a bit ripe and oaky). Freemark Abbey as well. Also some of the better Cameron Hughes is just short of $30 (lot 500 is available).
Seconded on the Chappellet. Two others in the TWENTY dollar range: Conn Valley Prologue (the 07’s were one my QPR winners of all time, but have not had any of the more recent vintages) and Seven Hills Columbia Valley.
The 2010 BV Rutherford Cab was surprisingly good when I poured it in Jan for a group of inexperienced tasters. I chose it as a baseline wine for what was to come after and it out performed my expectations.