No I have not. My suggestions are based on how I would go about doing such tests if I had the inclination to do so. But I do not, because I am on Mac, do not intend to install Parallels and Windows on this computer for what may be little (if any) incremental advantage (a lot of expense and potential Windows-related security issues) and I have been fully satisfied with the quality of print output I get from Lightroom, including the sharpening, which is very well-implemented. I know a huge number of Windows users think very highly of QImage, so if I were on Windows I would definitely test it quite thoroughly relative to Lightroom.
To be mindful of: I see from their website that QImage does not yet support the Sony a6000, which entered the market about four months ago. I would be frustrated by this because it is the camera I most use these days. Also, I could not find whether QImage supports soft-proofing. If that were correct, I would not use it for printing photographs, because I consider soft-proofing an important final step in adjusting my images for print. If I am wrong about that, so much the better for QImage.
Check Google (no need to install Parallels for that)
Sony A6000 is supported in QU since early July. http://www.ddisoftware.com/qimage-u/tech-raw.htm
Softproof existed in the old Qimage Pro already; Ctrl+space gives the softproof image + information of the printer profile/rendering, hit space again and the normal image appears, Esc to go back to the main menu. Robert will know that.
In QU profiling can be adapted per image when several are already nested on the print page. Few applications or RIPs that have that feature. There are more QU features like that. Whether Roberts needs QU given his low print volume is a question I can not answer. Print quality like Qimage can deliver is possible with Lightroom + some other applications Bart mentioned in other threads. Whether it works as fast and easy as QU is another matter. Recalling old jobs with the right QU + printer driver settings is one of the things I would not like to miss. The QU job log is precious data for me.
Met vriendelijke groet, Ernsthttp://www.pigment-print.com/spectralplots/spectrumviz_1.htm
April 2014, 600+ inkjet media white spectral plots.