Don't listen to the haters.
The 7.5" will hold up fine for a non abused 4 cylinder. The spider gears in the carrier are really the main weak point of the whole axle, and very likely addressed in any aftermarket carrier. Internet lore has it that the 7.5" spider gears are made out of powdered metal. While still fairly strong, not exactly as strong as it could be.
I went to an 8.8" Explorer swap on my 4 cylinder because I use it more like a loaded 1/2 ton, I've actually worn the 7.5" out after 210,000 miles. Still haven't broken it with all the yanking things out of the dirt, clutch dumps, and rough starts pulling heavy loads, and loading the bed to max capacity. I also wanted to "go for the gusto" and get a selectable locker, which pretty much ruled out the 7.5".
BUT, tru-tracs and every other axle component is roughly the same price between the 7.5" and the 8.8". And a Ranger 8.8 (NOT an Explorer 8.8") will bolt in with zero modifications. However, you do now have the extra cost of a rear axle on top of the tru-trac (but you will have a MUCH stronger axle in the end). but even then they can be surprisingly cheap ($100 as mentioned earlier, I've gotten an Explorer axle for $60 once). Just something to keep in mind.
I do believe your current axle with a tru-trac should suit you fine.
*edit: ha! back to the original question,
C-clip eliminators (with the exception of the Yukon Super 8.8" kit) should be avoided for daily driven use (for the 7.5/8.8 - 29 spline axles). Most use ball bearings (or so I'm told) and really don't last long on the street but are fine for the strip, where they are sometimes required. Unless it states that it's "not for c-clip axles" or "must use a c-clip eliminator kit", it will have a provision for c-clips.