Great shots Sys.
As a (very rough) 'rule of thumb', if the shutter speed roughly matches the lens size, then that should be fast enough to eliminate 'subject movement', ensuring a sharply-focused primary subject, but capture prop 'blur', rather than 'freeze' props, especially with Image Stabilisation engaged, given that any 'panning' is carried out smoothly, and 'followed through'.
Depending on (UK) weather conditions, I normally shoot at around ASA/ISO 400, with a 300mm zoom lens, and a shutter speed of around 1/350th second, using either center, or area AF.
On the odd occasion where fast jets (such as the Eurofighter Typhoon) are the subject, then I'll probably, if time permits, up the shutter speed to around 1/500th second.