Being able to set different crossovers for different uses can be useful I find: My AV9 has 5 memories so I could have 5 different crossover settings (and speaker level/distances if I wished) as well as my Oppo since I use it's internal decoder for BluRay viewing.
So for me just changing the input on the AV9 gives me two choices of crossover (any input that uses the current AV9 setting and the external analogue input which uses the player's settings). After yesterday's testing I now have a 60Hz crossover and phantom centre for high level BluRay watching, but for lower level day to day TV watching I use a 100Hz setting in the AV9 with the centre engaged which seems to work better as the phantom centre image tends to collapse at lower listening levels. Previously I'd just set everything to 80Hz without really testing it, so it's good to experiment and find an improvement. Every system and room is different so in the end it's your own ears that have to decide of course.
"Don't believe everything you read on the internet". William Shakespeare 1615