The latest Pipercross filters (600 series ?) also have the steel mesh now..........it's interesting to hear which is the best performing !!Pipercross: Ok quality filter, foam type
ITG: High quality foam type
Pipercross is cheap and cheerful has a mesh at the back to support but the ITG uses stainless steel wire which is better quality and isn't as restrictive.
The key to long life and better performance is maintenance. Keep them cleaned and spray the oil on them.
K&N make a good non foam filter that has a lifetime or 100,000 miles guarantee.
Again with almost everything, you pay for what you get.