After 5 weeks of play it looks like I've completed all of the A & B level races.  There were 50 series, 25 A level & 25 B level. 119 A level & 122 B level races.   The last series was B3 level Celer's Aqueducts.  The 4th & last event of the series, "Roman Legacy" had a 1st Place Award of 2305.  The series completion award was 31,500 $.  

Compared to the RR3 races, the performance of the other cars was much much higher.  In about 30 races, the time difference between 1 & 2nd was less than 0.7 sec.  

One general pattern I noticed was that the rally races were consistently easier to win even when my car's Pl was several points below the recommended minimum. 

Near the end I blew 2,130 G on the AC 378 which I used to win exactly ONE race.  For all of the other B3 races I used the M6 upgraded to 251.  

Just used 420,000 $ to acquire the Accura NSX (C1).