Membership or Marketpress for Donations?

Howdy everyone,

I am launching my new site today (ouramendment.com), and glad to have phase I development complete! That said phase II is starting, and has one item that is leaving me stumped due to the overwhelming number of options. (I guess that is a good problem to have)

I need to incorporate a flexible donations component that would either allow folks to donate once, or donate through a monthly or annual subscription. I am looking at the below options currently; however, I would like to hear any other suggestions.

Marketpress:
I know I have read about folks using external links to enable subscriptions in Marketpress, and the plugin is of course friendly to one time donations.

Membership:
Excellent subscription capability, and added flexibility in the future for restricted/ enhanced content. I do not see one time donations supported with Membership.