FM's CEMags is fantastic. $1.50 per e-mail, $15 on upsell, and more goodies too.
http://www.fantasymanmoney.com/cemags.html
You should be able to convert between 1 in 30 to 1 in 50. You should be able to get an upsell at rate of 1 per 100.
And of course Ron's been around since the beginning and runs one of the biggest companies in the biz, so you have super reliability with CE.