x200 series battery manufactures and prices overview

[ssd_thinkpad]

This is the list from ibm parts shop from the Hardware Maintenance FRUs for the x200 series:

4 cell Sanyo 42T4646
€91,53

6 cell Sanyo 42T4647
€84,45

6 cell LG 42T4648
€76,71

9 cell Sanyo 42T4649
€108,75

9 cell "9CBATTRY" 42T4650
There is a thread where a 9 cell panasonic is mentioned. So this may be the panasonic one!
€173,04

9 cell 43R9255
100 USD in Outlet

I heard that panasonic batteries are much better, so the availability of getting panasonic batteries for my thinkpad helps me deciding which thinkpad to buy in the x series. Is the 6 cell LG good? Is the unidentified 9 cell battery a panasonic one? Thanks!