[cisco-bba] Which IOS?

[d lists]

Hello,
I am wondering what IOS people are using or would recommend for the
following setup:

7206VXR NPE-G1, 1GB RAM, mix of PA-A3-T3 & PA-A6-T3 cards doing PPPoA and a
few FR T1's in a service provider environment.  The biggest feature I need
is VRF-Lite, but thats pretty common?  No MPLS etc (Though perhaps in the
future?).

I'm currently using the 12.2.(31)SB train, and with around 1500 active
sites.

Does that sound right, or is it time to move to a 12.4 mainline?

Thanks in advance

-dlists
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