The only thing that TextPad doesn't have that I want is the ability to execute the perl that i'm editing in a command prompt.

Have you looked at the Tools feature? In the Preferences menu, choose Tools and define a new tool thusly:

• Command: C:\Perl\bin\Perl.exe
  Parameters: $File
  Initial Folder: $FileDir
• Check the boxe labelled Capture output

This will run the Perl program and show its output (including any errors) in a new window.

It is then possible to assign this tool to a key (I use CTRL-1) for fastest use.