[j-nsp] SRX for access/core routing/MPLS duties?

[TCIS List Acct]

I've been reading past threads on the SRX line with interest.  It seems this box 
can do many of the things we are looking for (at a low price point), which include:

- MPLS
- IPv4 routing (OSPF, BGP)
- Runs JunOS
- Could be used at the access layer
- Future IPv6 support
- If required, could be used as an edge device holding a full IPv4 table (at 
least, the SRX650 and above)

Can anyone comment on experiences with these devices, such as:

- Wire rate?  yea/nay?
- Anyone ever tried to use one as an edge router w/a full BGP feed?
- MPLS -- mainly EoMPLS type stuff, esp. at the access layer
- Stability (we understand that this is highly specific to the JunOS release)

TIA.

--Mike