Best PPC/CPM For Signups ?

Can you tell me some good sites to use for PPC/CPM that have good conversions for signups ?

I'm running some email submit campaigns with adwords at the moment and they are performing great, im looking to expand to make some more money but i need to know some good PPC/CPM programs out there please.

Does anyone have any recommendations?

EDIT: Oh and both CPM and CPA sites must have good geo-tracking i think its called where my ad will only show for countries i pick.

 

For cpm I recommend - http://ads.snoork.com/

For ppc I recommend - http://adsense.com/

Hope this helps.

 

Thanks, i already use Adwords, anyone other good ones?

 

Oh and both CPM and CPA sites must have good geo-tracking i think its called where my ad will only show for countries i pick.

 

AdWords is for advertising your services.

AdSense is for earning revenue from your site.

What are you actually looking for, for cpm, ppc, or cpa ?

 

well all 3, CPM, PPC and CPA.

 

anyone ?