X vs Y. Screamers of tzeentch VS Seekers of slaanesh

Screamers (SoT) and Seekers (SoS) are both fast attack units. These are probably both the most powerful fast attack choices in the codex (furies, WHY!, blood hounds are ok, and you can see my decision on the hell flayer in my previous post) and are 2 units that your not sure which to take. In this post, i will either help your decision, or confuse you even more. Lets begin.

Seekers:
Pros:

• Fast
• Hit hard with rending
• High attacks and initiative
• Have assault and defensive grenades
• Cheap for what you get

Cons:

• Soft, low toughness
• Low strength
• No shooting attacks

Screamers:
Pros:

• Fast
• Good anti-tank/elite
• Tough, 2 wounds
• Lots of attacks
• Reasonable cheap

Cons:

• No shooting attacks
• Low weapon skill

Seekers are good at despatching hordes, while screamers are better and tanks and things like terminators. It all comes down to what you face more often.

Seekers can be considerably improved if you give them a herald of slaanesh with soporific mask (hit and run). This means you run in, cripple them, and run away, and do it again, over and over. This quickly becomes a nuisance for you opponent, and will whittle down their forces. Doing this makes seekers better then screamers, but more expensive.

Personally i don't know which to go for, so i will go with both. And if points are tight, like i said, it depends what you play against.

What do you think, which model is better and why? Tell me in the comments and they will be read and replied to.

Also, what should i X vs Y next? Choose 2 units from the Chaos daemons codex that your not sure what to take over what, then post it in the comments.

Until then.