I was looking to upgrade my acoustic, I found some cool Sigma's: Sigma 000MR-4 was one but the only reviews I can find are for the Sigma 000MR-42 model, has anyone had these guitars ? Any big differences between the 2 ?
They are both pretty much the same guitar and will sound more or less the same.  The difference is that the 42 has more shell inlay so it looks more flashy.  Both are quite high priced for guitars with laminate back and sides.
Not taking any online orders.