I've been pretty happy with my CADs. I own a pair of m177s, an M9 tube (Tung-Sol 12AX7), awesome on male vocal, and an E300, great for acoustic and mono drum room mic in omni and a Trion 7000 ribbon (guitar cab). All great mics but have their own characteristics. The exception was the Cad drum pack mics. I picked them up quite a while ago and was not very happy with the sound. They have all since been replaced with 57s, some audix, and a senn. 602 in the kick and a Studio Projects B1 on the outside front.
I have the Samson C02s currently on overheads as well and can say they have been sounding good on my kit.
That being said, I just picked up a couple of Royer Copies from ebay and have installed new Lundahl transformers in them. They are to be put through a Sytec pre as my new set of overheads. There are a lot of cheap ribbons out there and, after some research, found that generally speaking, ribbons pretty much all work the same way. A lot of their sound has to do with the transformers. So, I figured I would pick up some on the cheap and do a little soldering. They sound GREAT!
I'm on a bit of a ribbon kick lately. They get so much praise for many things, especially as overheads. Can't wait to get them going.
This might be another option for you as far as overheads go.
"110% more $ usually gives 2% better sound" Paul F.
Favorite quote: "Nobody walks down the street humming a reverb preset!" "Hmmm...Hmmm....something-something Large Plate..."