Not sure what the price/feature ratio is for your current package but a good rule of thumb is to look at paying at least, 50 cents per GB of Data transfer

source: http://webhostingtalk.com/showpost.php?p=3310978&postcount=8

atabases these days are cheap. You can build a TB mysql or postgres server for under $2000 easily, and you can host on 400GB servers for $80 a month, where you get the dedicated machine, or a machine that they take care of the admin for you.