A balance needs to be played here, and on a realistic level this whole thing is a numbers game. Although Destruction will require a total revamp of your character, drastically alter your strengths and weaknesses, and turn your gameplay into a more cut-and-dry DPS style, it is a very viable option if you can get your Crit to about 15% unaltered and get near that 202 Hitmark (reguardless of Spell.) The Crit% is much easier to attain, so for this option your main goal is going to be the most amount of SpellHit you can find.
With your Low SpellDmg and the fact that you wish to stay Affliction, I would say to place SpellHit and SpellDmg on about the same priority level (seeing as you have pretty low numbers in both.) On Boss fights, DoTs make up for about ~45% of your Damage, ~52% if you use Doom (and not Shadows), leaving still a huge percent of the damage on long bossfights dependant on SpellHit (even with Suppression) and a decent area to work with SpellCrit. SpellCrit will be the lowest stat to look for here, although it still can play a role in boosting your overall PVE DPS. With the fact that Haste now works on GCD, be sure to note that even for Affliction this is a very important stat as well.
Hitting the 202 SpellCap will be difficult in T4/Kara/Gruuls, but it's doable. I still, however, suggest finding the balance for Hit and Spell -- You're gonna want about 120-150 Hit and 800 Dmg unbuffed. When you reach that we can get to talking again.
Also, /Agreed on what ecirphsoj had to say almost entirely.
My suggestion - use your first 41 Badges to get
Icon of the Silver Crescent, try to get your hands on
The Staff of Infinate Mysteries,
, Boots of Fortelling, and the
Trial-Fire Trousers out of Kara. Where there's Yellow socket get "Great Dawnstone" for Spell Hit, where there's a Red socket get "Veiled Noble Topaz" for Spell and Hit. Any Blues you got go with "Glowing Nightseye."
Take advantage of your Hat's Meta socket. You can buy a decent Meta off AH or from Jewelcrafters and they can be gamechanging.