CPM or PPC which one a better option?

Hello DP members,
I need your advice on CPM vs. PPC, which one a better option.
I am having a hosting product and want to advertise by CPM or PPC methods.
Google and other SE’s are asking for $0.15-$2.5 per CPM
And for PPC, “web hosting” and similar keywords start from $0.10-$0.70 per click.
Which adsense sites do you prefer for this kind of product?
I am bit confused about what kind of click thru rate I will get, if I go with CPM.
I know it depends upon my product and my advertising material but still if you have previous experience please share with me.
Regards
D Maind.

Original post by WM7