The "Best Looking" is strictly a matter of opinion. Each person likes what they like. At the time I bought my '15 the Yamaha mount for their top box was pathetic. I followed FJRs with that top box vibrating and shaking... Plus the older version was double walled and did not have the interior capacity to match the external dimensions.
I much preferred the Givi offerings up to the recent 50Liter top case. To my eyes the 50Liter is just a bit too bulky. A nice case and beautifully color matched, just not appealing to me. Pop looked at it and refused to have it anywhere near his FJR. Again, we each like what we like.
If money was going to prevent me from setting up my bike the way I want it, I would take up another hobby. Cost was not a factor in my choice of top box, it was looks, capacity and weight. I am not criticizing anyone else for their choices, I simply believe that we must each decide what is Best for ourselves.
The Black Cherry color is unique to the 2007 year model.
I would not count on putting two full face helmets in the V46 or V47. It might
work or it might not. Will definitely work on the larger Givi boxes. I cannot speculate on the Yamaha 50 liter box. A SHAD SH50 will hold two full face helmets and again, they do offer a very nice mount similar to the SR357.
A few beauty shots of the Givi boxes...
Every FJR in this group of 6 has a Givi top box of one size or other:
The SR357 that was on Pop's '07...
Was still in perfect shape and I transferred it to the new bike where it is still doing just fine.