If you want a wide blade I would recommend a ASH-1 preferably the Fat ASH-1, for more narrow blades, the boss jack, HG55, Beefmandu, or the new urban grudge coming out, and for inbetween with the BATEC, infidu, and new S.O.S. coming out.
Between all those blades are a nice range of lengths from the ASH-1's, Boss jack, and Beefmandu all being in the 6" category, and then the HG55, BATEC, Urban Grudge 5" category, and the SOS, infidu being slightly smaller but still in the 4-5" category...
There is a lot of over lap between all of these blades, though. For example, the cutting edge on the BATEC and the infiudu are virtually the same but the BATAC has a longer overall length (do not remember off the top of my head but at least 1").
The same goes for the Boss jack and the HG55, the Boss jack cutting edge has at least 1" more in cutting length than the HG55 but the overall length of the two are almost the same, maybe a 1/4" difference or somewhere close (once again don't have specs memorized).
The same can be said for the ASH-1 and the SFNO, The SFNO is a 7" blade but its really only like a 1/4" longer blade from ricasso to tip when measured from the same points on the ASH-1.
Then the Beefmandu, in my opinion, is the best design between the HG55, Bossjack and the Ratmandu/infidu and jackmandu. It has the grip comfort of the RMD, the overall length of the boss jack and jackmandu, and the ruggedness of the HG55 with the thick spine, but it is also a slicer because of the deep hollow grind... But as of now the beefmandu is only available in SR-101...