"Which Perl IDE worth to give up my old editor" is frequently asked and hard to answer.

Mainly because there is no fixed set of criterias and definitions to measure IDEs (at least for non Java-like languages) ... in other words, it depends what you want and need for coding Perl.

Since I found ECB for Emacs (in cperl-mode) I gave up searching and started investing the safed time in improving my Lisp knowhow and optimizing my keybindings. (even experimenting with viper-mode ; )

Since Vi and Emacs always underwent a co-evolution (much like Sovjet and US space programs ; ) I'm sure you may find something equivalent to ECB for Vi, ending your quest for the "best" IDE. : )