if you don't have any issues with your current setup and are able to work efficiently with it, then i'd say theres really no point in changing. for me, the benefits of Reaper were mainly due to my previous programs not beign capable of all that i wanted.
having worked with Acid Pro, Cubase LE, and Samplitude V8 SE (all without instruction), the learning curve for Reaper for me was about 10 minutes. i found it super easy to use, and efficient too. it starts up quick, and seems to be easier on the CPU as well. tracks were easy to set up, arrange and label. inserting existing media files into a project was way easier than Samp or Cubase. just press CTRL-T to add a new track, one click and drag will arrange the track in the project, and the 'insert' key on the keyboard allows you to import your media file easily. The color schemes are customizeable which is a neat plus. you can as many submixes as you want and as many VST's. basically it has the features of the $500+ programs for a fraction of the cost. plus there's more customizeable setup options which allow you to mold the interface to your liking.
plus the support seems to be great, and bugs/issues seem to be resolved rather quickly with new updates coming in all the time. i'd say to just try out the trial version, which is fully functional by the way unlike other trial versions, and see if maybe there's something you might like better that Reaper does. if not, then just keep Logic. but even then, for 40 bucks you might even want to just keep both?
the only thing i'm missing is being able to have VST's arranged into folders by category. it seems that Reaper just piles all the plugins into a single location, sorted by DX, DXi, VST, VSTi and
Jesusonic (as opposed to having VST effects sorted by function for example). this makes it take a little longer to find the certain plugin you are looking for since you have to dig thru dynamics, EQ's, 'verbs, modulation, etc which all appear in the same area. unless there is a way to sort them that i'm not seeing.
routing the effects is a breeze though, once they are inserted. it's just a click and drag type deal to move one effect ahead of another in the chain. there's other cool stuff about the program that i liked right off the bat as well, but i'm at work and cant think of them all right now.