Who Should I start

This is a normal PPR league, and we use two IDP's.  I have Deandre Levy and Harrison Smith starting right now.

I could pick up Clay Matthews or Ha Ha Clinton Dix, or both.  Have some players I could drop and still keep Levy and Harrison Smith.

Any advice on a combination of two of these four players?

Thanks

What's your IDP scoring system?  Tackle-heavy?

Levy has been a beast this season.  He's #5 overall in my league in scoring.  No way I don't start him on a weekly basis.

Similarly, Harrison Smith is top 3 in DBs (at least in my league).

Personally, I wouldn't bother with Ha Ha.  I used him as a filler when Burnett was out one week, and got good production, but I'd stick with a SS vs. a FS any day.

If you have the roster space, I think Matthews is worth a pickup.  The move to ILB was obviously very good for him last week, and the Eagles run a lot.  There's tackle potential for him if he stays on the inside again this week.

Overall, I'd be hard-pressed not to stick with the starters you have.  You have 2 studs.

That is awesome.  Very helpful response.  Yes, the league is tackle heavy.  One point for solo, 1/2 point for assist.  

I'm rolling with the starters.  Already dropped Ha Ha yesterday.  I think I will take your advice and pick up Matthews too though.  

good move dropping Ha Ha.. in most IDPs that don't require a DB, theres only 3-4 guys worth starting over an LB.

Clay is worth the grab, drop your dead weight youll never start and grab Clay who if he sticks at ILB will most likely be as good or better than Harrison( LBs are generally most consistent).