Thanks Przemyslaw. I looked at digiKam but it seemed to be a bit buggy. I'm Ok with spending money if the product is stable, well-supported, and at least seems like it will be around for a while. Thus far I've downloaded trial copies of ON1, Luminar, Photo Supreme, NeoFinder, and Capture One Media Pro.
I have a 2011 iMac so some people might have a different experience but here is my unscientific assessment of each product so far:
ON1 - Lots of promise but buggy, slow and sometimes freezes up. Poor transition between editing tools. Nice cataloging. Does not support APh files. Creates Photoshop files to handle layers (ugh!).
Luminar - Was supposed to add DAM by now but has not. Editing tools look nice but without DAM not of use to me. I already have good editing tool in APh.
Photo Supreme - Nice interface, slow catalog speed. Its cataloging right now. No editing tools. It does handle APh files and will launch APh. Supported by a large company has lots of users. Server and Single user versions. Promising. Need to work with it for a while.
NeoFinder - Clunky interface, fast catalog speed. I kinda like it but need to work with it more. Neo/finder also handles APh files and launches APh. Claims to be the only DAM that does a lot of things, handling APh for instance, but as previously stated Photo Supreme does as well.
Capture One Media Pro - Has all the features I want but it is truly a Pro product with a Pro price as well. I felt its RAW conversion was not as good as LR5.
There's a good possibility after trying these products and some others I might wind up staying with Adobe Lightroom. I'm opposed to the subscription plan and grate my teeth every time LR calls home. But it supports my workflow well, tools work well, and its reasonably performant. Sigh...