Spark plugs.. $100 ("version" dependent) plan about 2 hours for installing yourself (12 plugs)
Throttle body - what we N/A owners upgrade to for about $150 and about an hour to install
CRANK POSITIONING SENSOR.. $45 bucks.. has seen issues..non start on SRT6 and no code thown.. off brand..

Your money but the voices of experience here really suggest start with that sensor..