I know there are a lot of cons to them, but for what you are describing I would consider getting some of the Field-Replaceable fittings. They have 2 or 3 pieces that fit into and on to the hose and then the ferrule screws down onto the barrel.
If you have a few feet of each size hose, a handfull of ends in the most common types and an assortment of adapters going from JIC to NPT/O-ring face seal/etc, plus 90 and 45 degree.
Another plus with the F-R ends is that with some types they can be re-used, so you can make a hose to get a machine through the day or back to the shop, get a crimped hose built, and then return the parts to stock.
As far as brands go, I was happy with the Weatherhead machine and fittings line that I had at my last gig.
It has the smooth crimped collars instead of the convoluted style some have. Much easier to feed through tight areas and less problems with catching on moving systems. If you crimp it right, there is no flare on the back side of the ferrule at all.
Napa Auto Parts sells the Weatherhead line, and a lot of stores stock it, and the warehouses are usually only 1/2 a day to a day away.
As somebody else mentioned, you have to pick a brand and then stick with it. The hose, fittings and crimper all have to be the same brand and the correct match according to the manufacturers spec sheet. Make sure you get the chart with whatever brand you go with, and follow it exactly! If you put a 2-wire end on a 4-wire hose, the crimp is not going to be correct and it either will be too loose or damage the hose, same with using the wrong die or the wrong spacer ring/setting on the crimper. If you read the "book" (seriously, each brand has a book with all the hose and fittings and application info. I know you can get Weatherhead free from Napa if you are buying the parts from them) it is pretty easy to figure out what you are doing.
I will say that every fitting I have ever seen blow off was either a mis-match or improperly crimped. (never lost one of mine, yet...
