BiaAS, I think t-mag is pretty lame to be honest with you. Actually prop/tren/winstrol (in an oil suspension) works extremely well for quality gains in lbm without side effects. You can mix them all into one soultion for your daily injection, and the winstrol's cross-binding effects (as well as the way it will compete with the other two hormones for AR's... this is more complicated than I care to get into) with other receptors should aliviate some of the estragenic and progrestin sides of the prop and tren, as well as lower shbg levels. I've had excellent luck on this combo, but I don't care for the sore joints or the potential for connective tissue damage with the heavy weights I use. I substitute boldenone now, because it tends to increase collegen synthesis (this reducing my chance of tearing a tendon), has a positive effect on hemocriptin levels, and I've noticed taht mild anabolics always tend to reduce the side effects of trebolone when stacked with them, although most do not do so as well as winstrol.
To answer the question why prop over enathate? Prop has more testosterone per mg than enathate, I can aquire it cheaper, and since you are already doing daily injections with tren, why not mix them, and just do your daily shot, rather than a larger once a week shot of the enathate thrown in?