There is alot of nice information there...The "none are recommended" comment doesn't make much sense...Well, what else can you use that has a 20X1mm thread, has the same flow, and relief valve specs ?
On the Bandit 1250 I use the Wix/Napa 51359 which is directly cross referenced for the bike as well as many other Suzuki models...Very quality looking unit..You can buy alot of them at fleet filter for $5.88 per filter