you say you're fed up with old solutions and old ideas, so MODO would be a perfect springboard.
regarding LWCAD, to say it's a plugin really is an understatement. it's pretty much a modelling solution in itself and has a vast array of tools, many of which are ArchVis specific. i've been hoping for a MODO version ever since i became a MODO user.
http://www.wtools3d.com/product.php
too many tools to mention but amongst others, full set of advanced CAD snapping and inferencing tools, realtime booleans, roof tools, roof tile tools, comprehensive window and door tool, and so on.
LWCAD is a set of tools, not was. it has been going for years and the developer keeps releasing great updates.
that Polyline Pro tool is useful i'm sure, but it's a single tool and can't even begin to be compared to LWCAD's suite of advance tools.
i find it amusing that the vast majority of renders i see could easily be achieved using SketchUp alone and pretty much any render engine. yet if any new users come here asking for advice it's always the same response - get Max and Vray (though Corona is starting to gain some momentum).
3DS Max is essentially a hub for other tools and processes, and most of Max itself - modelling tools aside - is unnecessary for general Arch/ProductVis. so what makes Autodesk so critical to the AEC industry? ArchiCAD is a fine, if not superior, replacement for Revit, there are countless AutoCAD clones if you need 2D, and modelling the average house these days can be accomplished in any number of modellers - MODO, SketchUp, FormZ, Rhino, Blender etc etc.
render engines are 2 a penny - which engine does Autodesk build again?
in any case, for every great Max/Vray render there are 100 mediocre ones and just as many rubbish ones, so as always it's the artist using the tool rather than the tool itself that's important.
of course Max has a vast collection of resources available, but how are things ever going to change if the cliche' response is to stick with Max because it's the industry standard?
at the end of the day, i'm really not that bothered because i can do everything i need without having to touch anything Autodesk, and there are plenty of other users that would like the same.
so, Mr Johnson, if you're serious about doing away with the old and embracing the new, give the MODO forums a try and ask there. i may be completely wrong of course but i think there are lots of users waiting for a quality CAD/ArchVis/Hard Surface set of tools. requests for LWCAD style plugins consistently appear on the forums and there is always interest.