I'm comparing payment processing options for a very straightforward SaaS app. I was heavily leaning toward Braintree, but Stripe and Samurai seem easier/cheaper. Is there a strong reason to go with Braintree? I'm not sure if having my own merchant account makes a big difference.

The pricing for 1,000 monthly users looks (roughly) like:

(edit: I did the % based on $9/transaction)

Stripe: $329/mo @ $3,948/yr

Samurai: $358/mo @ $4,296/yr

Braintree: $487.90/mo @ $5,854.80/yr