I've been interested in shifting my build over to dual wielding for a little while now (I'm currently sword and board), but I'm not sure how well it'll work out for me. I'm level 35 right now (can't give particulars on my char and build because I'm at work).
I forged a couple of Skyforge daggers before I found out that they can't be improved any, which is mightily irritating. I went ahead and picked up the perks that make dual wielding 35% faster, I'm around 90 in sneak (still can't sneak up on Falmor, though; what's up with that?) and 70 in archery (so I'll be able to soften up most targets before they get to me).
I'm wearing the armor that the Dark Brotherhood outfits you with, and I've got an amulet that increases health regeneration by 15%.
I'm not really married to any of the things that I'm using right now, so I'm more than willing to switch up my weapons, use potions, etc. to make a build like this work better. I'd love to hear from some dual-wielders when it comes to what works, what doesn't, and whether it's awesome as I think it would be to rock two daggers or two swords or whatever the hell else can be dual-wielded.
You, friend, have an excellent build. I always, always advise that SnS builds invest in the dual wielding perks. It's only three perks, so it's not a waste, and it vastly varies your combat. You can go from defensive to offensive in a flash, and how offensive you can be, especially since you have Sneak! Also, kudos for fitting Archery in there; I never have room xD
Dual wielding is almost a must--I can't NOT have it with any build that uses One Handed, since it gives you such variety for so cheap a price.
Almost any combination of One Handed weapons is useful. Two maces deal great damage per hit, and daggers are insanely fast with the +35% speed bonus. You can mix and match to have good speed and good power without sacrificing much of either, like a sword in the left and an axe in the right.
A word about dual daggers, though:
Relatively speaking, they're only useful if you're sneaking. In regular combat, the dual power attack with daggers has only mediocre speed--so it's not very bad--but it also isn't as powerful as the larger weapons. For that matter, two swords will have a faster dual power attack if you have +35% attack speed. If you want to attack at your fastest, have a dagger in the left and a sword in the right. Not only will they both swing individually faster than all other weapons, but they also will have the fasted possible dual power attack.
When it comes to sneaking, two daggers is not always necessary, but handy. If you can sneak attack with one hit, then you're likely well-hidden enough to do so with three. At a low level and with only steel daggers (one fine, one unimproved), I was able to take down a giant. Normally, I only go about with one dagger, but that wasn't enough. So instead of attacking the big guy once and getting launched into outer space, I whipped out another dagger and was able to down him before he detected me. Remember, when sneaking, a dual power attack is faster than three individual hits, even with daggers, and all three of the hits from a dual power attack can be sneak attacks if the enemy doesn't detect you in time.