help my guinea pigs is mr bean

I'm in the market for a new hay, as current hay has changed. I know there are loads of threads on here regarding hay, I've been reading through them. It all seems very confusing as to what is good/bad, what WAS good and isn't now, what changes in every bag etc. I've looked into various ones like...

So Phillip has beautiful long whiskers to go with his lovely blonde hair... all in all he's a very pretty boy - if he was a human he would probably be swanning his way down a catwalk and i think he knows it! Now Womble, well he's a totally different story - he's to put it kindly just a bit...