Juniper M10i sufficient for BGP, or go with M20?

[Neal Rauhauser <neal () lists rauhauser net>]

 I don't know much about Juniper but I'm about to learn with a new job. 
If I'm going to take full routes from a couple of upstreams and have a 
couple of peers will the M10i (768M max) be enough or is the M20 (2048M 
max) a better choice. Layout here is such that I'd expect to use a 
single quad gigabit port ethernet blade in each of a pair of M10i/M20 to 
achieve redundancy.

 Is there a pricing resource for this stuff online some where? I do 
*not* want to hear from any sales people over this comment ...