Well, everything is in the title.
Which cheapie is the best one in the key of C ?
For the moment I consider the Generation and Clarke Meg ones. Do some others exist ?
Waltons.
I’m with Bloo. The Walton’s C isn’t just the best inexpensive C, it’s one of the best C’s at any price. It growls.
Didn’t know that Walton was making a C.
I have 2 waltons : a brass D which is quite poor and a little black one that plays very good.
I’ll have a look to the waltons C. Is it a brass or nickel one ?
Not a cheapie, but an outstandingly good C at a good price is the Freeman Tweaked Feadog. You can buy the D/C combo for about $50 from Jerry.
The Feadog C is a good whistle. Waltons C is ok but the tone tube is a little short making the bell note sharp. This can be corrected with a little tape over the end or an O ring pushed in. It is hard to find an o ring the right size without having to cut it then putting it back together with ca glue. There is some neoprene tubing that fits well then cutting it to about a little less than 1/32’'.
I have a Waltons C and thought it was a little weak. It’ gets very breathy and weak in the second register especially. Good whislte but I wanted something stronger (not louder, just a little more focused).
There is an Oak C that was passed back and forth between my cousin and I that was pretty strong.
I have two Generation C’s (red top brass) that are great. They are bugger to make tunable but I’m enjoying them now.
I also love the Feadog C.
The Feadog and Gens were both bold whistles that gave me exactly what I missed in the Waltons.
I like my Oak C. Strong but mellow.
Not quite cheap, but anyway,
Susato c.
My favorite C is a combination of the Walton C head (I liked it’s tone better) and a Feadog C tube (much better intonation) the sum is way better than the parts.
Generation nickel with a Walton fipple is one of the best Cs I own.
I like the Feadog C (esp the nickel one).
The Susato is another favorite of mine.
Do not get a Sweetone C. Unless you don’t like it to be in tune with itself.
Thierry,
I just love this whistle.
If you are tempted by the Walton C, Le Comptoir Irlandais in Paris sells them for about 6 euros (that is where I got mine and my daughter’s).
You can PM me for the address.
Pascal.
I’ll second that. Sweetone C’s are the worst I’ve seen yet.
That does sound good. I should try it.
Thank you for all your answers.
Ok, I will forget the Clarke one.
As I understand the Generation, Waltons and Feadog are appreciated by you guys.
So, as these are cheapies, I might buy several and experiment to switch heads ! 
Hydromel 89, I didn’t know le comptoir irlandais. Great news that such a shop exists in Paris.
I hope you mean the Sweetone, which is also made by Clarke. There is the Clarke original in C, which is a smashing good whistle, esp. after you smash the windway.
Thirded. The MEGs are even worse.
Agreed.
Just in the interest of increasing the size of the statistical sampling, I just bought two Clarke originals in C. I had really liked my Clarke D’s and hoped the C’s might be similar. Unfortunatly both of them were so badly out of tune with themselves I could not even correct it with any amount of breath control. They would get hung up between octaves before reaching even close to the proper pitch on some notes. I realise that two of them are not a definitive sampling but these two were pretty bad…