I'm still experimenting with the sample pack of blades I bought with my DE89. Having tried an Astra, a Gillette Blue and a no name Israeli blade, I like the Astra best. Next up is a Feather...
we'll see how that goes. I ordered some more
from this eBay seller where you can mix and match from a wide range of blades, at very reasonable prices too and fast shipping. No affiliation, just a happy customer.