Ask HN: Payment Processing for marketplace

I'm working on a marketplace website which connects services providers and services seekers (much like eLance, oDesk etc). As in typical such a model, it escrows money from service seekers, makes match between providers and seekers and distributes money to providers when the job is done, while retaining its own commission.

I'm wondering which Payment Processing Provider will be best suited for my needs given that there will be many small amounts of collections as well as payments (ranging from ~$20 to $150). I also don't want to take the hassle of lot of manual admin overhead.

Stripe seems like a great choice only if you are doing only collections. Although PayPal makes receiving and sending money pretty easy, I've heard horrible stories about it.

Are there better options out there?