I've got both and if you add Gillmore to your list, these are the sounds I go for the most- To sum up what others have said, if you want entirely the classic sounds you would go SSS-
But, the S in the bridge is the sound I least use and I use lots of combintaitons- If you are going live a good splitable Humb (like the JB) it would sound extremely stratish in 2 position. But the addition of the bridge full humb is something you just can't otherwise get on a strat- So if you will ever play rock that isn't clapton/srv/knopfler, it will sure come in handy-
Note that not a lot of humbs split very strat like and this is one of the reasons I highly recomend the JB.