What is better a cheaper merkava1 namer or a merkava 4 with trophy!

And why idf want to scrap dozens of old merkava 1 insted of convert them into namera! and where are the ofek merkava 2 ! and the magach heavy apc program, we didnt see pics of them from usual criptic idf! they must replace also nagpadon puma etc, with a merkava hull with a new super stracture more heavy.