Both weapon should have the same attackspeed, but if you want to increase your speed, you could always hit weapon enchant.
The cooldown on the spells you can use meanwhile, is fairly small with a little gap. So you should be able to keep busy.
Yeah agree with the above posters you need two of the slowest agility one handers you can get. Also on a PVP Enhancement note, Vanguards over at Arena Junkies has released a Enhancement PVP guide. He is currently rocking beast cleave at 2450 MMR and it is a pretty solid guide http://www.arenajunkies.com/strategy...aman-guide-52/