I have a crestie hun he is delightful. Here he is my little Icky.
I feed on CGD just make sure you get a good one as the Komodo stuff gets alot of complaints as it not as tasty. I do keep mine on live as well as CGD and I agree he is a bigger boy feeding the live but there is alot of goodness in the CGD for them so its best to feed both I think.
My brother picked up his crestie for £70.00 the other week but they a little harder to come by where I live for some reason. I think I paid £60.00 for mine worth every pennie though.
Very good starter rep and quite hardy reps as well.
Good luck with whatever you decide, when I bought Icky he was just a plain brown now he is a burnt orange and flame yellow.
Sparkle is a great member on here for CGD recipies to make the CGD more interesting she also well clued up with Cresties.