Need Advice! Best SMS/MMS app to replace Touchwiz app??

Hey Army,

I need your advice. I have a GS3 and the text messaging app is painful to use sometimes. I have Nova Prime launcher installed, so I don't really see much of Touchwiz, but the texting app is a big flaw for me.

Can you recommend a different app from the Google Play Store that can handle SMS and MMS messaging, and is also safe to use? (I get paranoid about my data going through sketchy servers...)