The addition of an 85mm F1.2 will mean there are super-fast portrait primes for all the major full-frame systems.
Auto, Auto FP high-speed sync, auto w/redeye reduction, auto slow sync, auto slow sync w/redeye reduction, fill flash, rear-curtain sync, rear-curtain w/slow sync, redeye reduction, redeye reduction w ...
New photo gear can be overpriced and sometimes it's hard to get. The secondhand market delivers better value if you know what to look for. These are my best tips.