Just my .02, but for those looking for a full-featured view cam with bellows and extended movements, the Arca M-line 2 is pretty compelling. In addition to being rigid enough for high res imaging, it is relatively lightweight and compact. It is NOT hand-holdable though, but then nor were most filed view cameras when we shot 4x5. Recessed lensboards available for very short lenses, and special adapter boards so you can use your RM mounted lenses directly on the M-line. As a plus, you can replace either standard on the M-2 with the RM3Di camera body. This gives you added flexibility and movement capability. One of Arca's key strengths for years has been its modular approach.
*The Technar may be as versatile and adjustable as the Arca M-2, I just have never used one so cannot comment directly.
FTR, I have owned or used:
1) Cambo Ultima. IMHO it is not rigid or precise enough -- when you lock the standards down they move, rendering it almost useless for medium to short lenses. It is heavy.
2) Rollei Xact. Great camera, very solid. Could not use lenses shorter than around 60mm on it and it was heavy, like 9 pounds or almost 4 kilos. Excellent studio/product option.
3) Plaubel. Also impressive design, extremely rigid, very nice geared movements everywhere, but even more restricted in short lenses than the Xact and weighed even more than the Xact! Could use Rollei electro-shutter lenses. Another excellent studio/product option.
4) Silvestri Bi-Cam. Lighter in weight than any of the above. Adjustments were relatively crude and imprecise, was not very rigid -- even worse than the Cambo.