I have a Hensel Fresnal on order ... which isn't like an Arri, it IS an Arri.
This type of lighting isn't everyone's cup of tea, but it is mine ... so YMMV.
-Marc
Hensel has three nice spot options.
One is based on an Arri chassis with a 30cm fresnal
The other two are based on ADB Television Spots, both with 30cm fresnel
I have worked with and owned both of these in their original tungsten versions. They are very nice. The only limitation they have is that the fresnel is more sharply shaped than the lenses designed for strobe that Broncolor and Elinchrom use. This can lead to some banding on shadows created by using two flags or fingers very close together. Minor problem really, but does make a difference in projected shadows of hair if the model is right up against the background.
I like crisp light but also like the sort of enveloping "soft crispness" of using there large fresnel lenses.
I also make my own lights. Leko type lights and I am working on two giant fresnel lights. One a 70cm and the other a 165cm.
The 165 is quite amazing, but I have to figure out how to make it more maneuverable.
I shot this with two Elinchrom 35cm fresnels and an SL44 gridded "kitchen sink"
Toyo 8x10 Schneider 480mm f8.4 Symmar-S
This one is with a single Elinchrom Fresnel spot:
Fuji gx680 250mm f5.6
There is also a smaller spot called the Jinbei S-26 Spot-Box.
It is really nice with a 9 inch lens. They are about $200 and are available with various mounts. Nice build, light and also have a support for heavier mono lights. Very handy on location. They are also quite deep so they focus the flash nicely to a tighter beam letting you use them at large distances so as to look more like the sun.