Hi Standa, Grohmann knives are among my favorites. Without going on and on, my best suggestion is to go explore http://www.grohmannknives.com
and read some of the testimonials, customer letters etc. on their site.
The stainless is 4110 German stainless and their carbon is a European C70, which I think is similar to the 1084, with Rosewood, Dymondwood (Xtra), and stag handles available.
Grohmann has won many awards and have a display in New York's Museum of Modern Art, but what matters is how they feel in your hand.
R1 specifications: blade is 4" by 1" from 1/8" stainless stock, overall length is 8 1/2"
R2 specifications: blade is 3 7/8" by 3/4" from 3/32 stock, overall length is 8".
Both hollow ground.
(There are also the several other models, including skinners, their Boat knife, three folders, and the Campers, which are same shape and materials as the R1/2, but flat ground.)
Hope that helps...
for Grohmann and Marble's knives.