+1 on Perfect Resize - it's by far the best for the money - the $50 stand-alone version is all you need - though CC's resize feature is catching up, but not quite there yet for major enlargements.
Does anyone have a good workflow from RAW files to large prints (i.e. 16x20, 20x30, 24x36, etc...)? I'm shooting from a Canon 6D and am using Lightroom 5/Photoshop CC to do post processing. I am using a 2009 iMac. Are colorimeters really necessary (I don't really want to spend ~$100 just to calibrate my screen)?
As for scaling to sizes larger than the 6D's native, I use On One's "Perfect Resize 7.5". It looks a bit better than CS5 or LR. I have not tried CC.
I bought the whole OnOne package, and honestly I do like all of it. I guess a lot of the features are similar to other third party software (such as alien skin, etc.)...but it even has a dedicated portrait editing suite. I'm no expert there, but it seemed to work fine. The Effects suite though, is quite fun to use, and will open in LR. I don't use it a lot, but it did a superb job...even mind-blowing, especially on one of my prints that I had done on endura metallic paper.
How much better is CC than LR 5, overall?