I'm currently looking for a pair of double melded pants for my bard, and I'm seeing a lot of Vitality & dexterity instead of strength & dexterity double melds. Is there a reason for this? Does strength add much of a bonus that's actually worth it for bard?

Should I buy these cheap Vitality & dexterity double melded pants or should I wait until I see a good deal on Strength/Dexterity pants?