I love my Cobra, it's my most favoured shaving tool. It's effective with both the Kai Mild blades and the Feather. For me the Feathers last longer, but I get a smoother shave from the Kai.

My favourite DE razors currently are the iKon OC Deluxe and Standard. For variety you might acquire a complete razor and then the alternative head?

My other go to DE is a Mergress XL (Merkur Progress with the longer metal knob). For me, this adjustment to the weight and balance makes the razor preform admirably.

If you are after an aggressive razor, for me the Joris caters well for this. I've owned a few and have reduced my collection to the all metal handles as opposed to the wood, horn or acrylic options. Like the Mergress, these options just provide a better weight and balance in my opinion. The Joris is as much an art piece as it is a razor!