Best Rogue Haste Item? FBSS vs. Velium Swiftblade vs. SCHW

[medievalerror]

As a Rogue nearing level 20, I'm wondering which of the three makes for the better haste item: FBSS, SCHW, or Velium Swiftblade. FWIW, I'm playing on Red and wielding a Frozen Shard (13/26) in MH and Kelorek`Dar Spine Razor (9/20) in OH.

The Swiftblade of course has the highest haste at 36%, but dmg is 5/24 and no stats...FBSS has no stats except 21% haste and sits in waist slot (where I could otherwise put a +STR belt), and SCHW have 22% haste and +3 to all resists, which is nice for PvP but really at lower levels I won't be encountering much of that. So, as a Rogue, any suggestions as to which of these three I should be saving for? Many thanks!