Thanks all, after weighing all the input and considering my light soft synth and effects usage, I'm going with Triplets' refurbished 3.4 gz recommendation. Really appreciate the help and insight from everyone.
I'm sure this has been covered before, but I'm looking to upgrade my platform (my Macbook Pro at 2.0 gz is bumping it's head ever since I added Line 6 Helix Native to the mix). How much iMac to I need to run everything smoothly. I won't be doing anything heavier than Logic on it. Thanks