I want to invest my hard-earned money to buy a chess engine which can help me to:
- analyze games easily
- experiment with different opening repertoire
- strategical analysis
- positional play
I don't expect an answer like, all are good enough to beat a human player, etc. I am not looking for an engine whom I can beat, as I know it's not humanly possible for a 1600 rated player to beat these engines, but my purposes are different (as given above).
So, if you have or use any of these engines, please let me know a comparative detail on which one I should go for.