Really? Those prices are pretty high for each of the added features. Sorry, but it isn't worth it at those prices. I would pay something like $45 for all of those features, but not separately. All of those "premium" features can easily be addressed for free if a WordPress user is willing to do it and take a little time to do so.
Seriously, make it worth it. If we can't get the value out of it, then it isn't worth the cost. I get that you guys are trying to get compensated for all the hard work, but that needs to be balanced with value.