For $400, the SL1210 Mk2 available at Musicians Friend is a no-brainer. However, if you can get a good price on a 1210 M5G (I got mine for $500), it's worth it for the upgraded tonearm wire. The rest of the upgrades on the M5G have no audiophile applications.
OTOH, a KAB tonearm rewire is $169.00, which would be better wire yet (e.g., Cardas) than the improved wire on the M5G.
OTOH, a KAB tonearm rewire is $169.00, which would be better wire yet (e.g., Cardas) than the improved wire on the M5G.