I've been running Forrest for a few years. Lucked out, there's a magazine publisher that has their offices about an hour from my house. Happened to be there after they did a sawblade test. They had about 120 blades, they gave me nine. Some were Forrest. They cut great and I've been using them in my table saw ever since.
I cut a lot of framing lumber in my 12" dewalt chop, I have 2 generic Dewalt 60ATB blades that I use when framing. When chopping trim I swap out the Dewalt blade for a Forrest 80 or an Amana 80.
My stacked dado set for the table saw is Oldham.
I don't even know what I run in the circular saws.
You're right...the Dewalt ROS is the 421.
I also think Ryobi is too lightweight.
I have friends that have the Hitachi and Makita sliders. Very nice saws. I've had the 12" Dewalt for 8 years. Keep waiting for it to break hard so I can talk myself into buying a slider, but the Dewalt keeps on ticking...and cutting.