Guitar Cabinet Mic

Would appreciate advice from the 'learned members' on the best buy for a cabinet mike for the AC50. I'm currently looking at either a Shure SM57 or a Sennheiser E609, how do they rate? With due regard for prices, any others that are proven performers in this task? I have noticed a Marshall unit, MARSHALL MXL 2001 MOGAMI MIC CONDENSER MICROPHONE (pictured) but not a lot reviews about it.
Regards
Regards
