Focusing macro shots

I've got some options when it comes taking macros I am trying to work out the best option.
Anyone that has tryed to auto focus for coral macros know it does work worth a damn.  Macros, manual focus for in tank shots is a must.
So back to the options
1) My S3 in manual focus mode has a magnified little window that pops up.  Helpful but it still its a 50/50 shot wiether it turns out.  Dump the photos, blow it up on the computer and see how it turned out.  They all can't be winners but it would be nice to up the percentage.  To be able the catch a moment and such.
2) So I tried out the hooking the camera to the TV.  6MP camera connected to a HDTV.  Should be plentily sharp to focus right.  Well thats a 6MP camera thru the little one cable composite video hooked up to a HDTV.  It's a step up versus the little display but leaves much to be desired.
Anyone got a real smooth way around all of this?

 

Yep but the composite is the only LIVE output.

Unless the USB will work. Never tried that.