Just an FYI. I got an email today announcing carbide blades for the DW735 planer. They're made by/for Infinity. They're only one-sided (can't flip 'em over like the steel version), but Infinity says you can resharpen the carbide ones "multiple times."
They're priced at $249, but if you order this week they're $199. This price seems to be more or less in line with Infinity's other carbide-tipped blades. They are a bit pricey compared with other companies' generic (not for DW735), carbide-tipped blades, however.
Not sure if this is a good deal or not, but I thought I'd throw it out there to see what everyone thinks.
Disclaimer: I have no affiliation with Infinity other than having ordered a catalog from them once.