I'm using the 1.100.00R radio on the GiffGaff (i.e. O2) network in the UK and this gives the best combination of reception and battery life for me. 1.77.30p also gave pretty good reception but the 1.77.36p gave pretty dire reception.
I keep intending to try one the recently available 01.27.00 radios but haven't quite found the time just yet.
I keep intending to try one the recently available 01.27.00 radios but haven't quite found the time just yet.