the 2 azfe is a very neat fit into a *e** chassis and with the amount of aftermarket support available in the usa it is a good choice, 4age stuff is expensive these days and they are late 70s-early 80s technology.
2az is 90s technology ,bigger capacity,readily and cheaply available and as Matt said no weight penalty compared to the old 4a engine.The only real problem is the fwd only configuration ,but being Toyota there are ways to RWD it quite cheaply and easily for those willing to attempt it , also a bonus is the ability to use a w series box which is substanially stronger than a t-50 .
think about it , $500-1200 for a 4age vs $50-400 for a 2azfe . there are literally thousands of these engines in wrecking yards everywhere and they will only become more plentiful as time goes on .