Probably not... the S5 is twice the price, and a marginal power efficiency and speed improvement over the S3. It's essentially two S3s in one body, without the water cooling of the C1, plus a marginal improvement in performance.
And really they just gave people a reason not to buy the C1. They just made their own product obsolete.
The C1 was probably way to much for most people. I have zero interest in taking care of liquid cooling. I am considering the S5.
you probably want to shop around before you commit to that S5... we are moving into a dense time in mining and any rig bought now needs to be super-clockable up and down to stay profitable.
I am only running 1THash/sec. I only mine as a hobby. I have 1 S1 and 2 S3's mining away . My S1 is for an Altcoin I love and my S3's are for bitcoin. I like having my "vote" on the network. I am tempted to get an S5 then I could shutdown the S1 and use one S3 on BTC and the other on the Altcoin I like. Not sure though, I would like to keep my power draw under 1KW. Although I suppose 1.3 Kw is pretty darn close but still. I guess I could just run the S5 and 1 S3 and keep the other one as backup.
Although on the same page the heat the S1 gives off is amazing in these cold months lol, mind you slippers and sweaters are a solid and cheap counter to cold lmao.