I believe the SRAM 11-34 would make the most difference, but you'll need a long cage der. to go with it and a few more links on the chain. Why dont you come down a few teeth on your granny? Then you can keep your 11-30 rear. I've used Sram and shimano and have not seen any difference in wear--Now I use Sram primarily because of cheaper price. My gearing is 26-36-46 and 13-32 cassette and have all the range I could ever use.
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'94 Schwinn Moab 3
'03 Giant OCR Touring
'06 Surly LHT
'01 Giant Yukon
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