For new brass, depends on the cartridges you want? . 45/70-Winchester and Remington.
Precision shooters use Lapua and Norma brass. These are very expensive, but highly precise in most examples.
I find Hornady brass to very soft. and Nosler far to expensive to buy in calibers that are also made by Rem'/'Chester
Used brass requires close inspection. In military calibers, range brass may be once fired or fired multiple times and was left for a reason.
If you know the brass is once fired? Scrounge all you can!
However!
A word of caution. IMHO! Knowing what you are doing is paramount! A few bucks saved is not worth your life or health. A Brass cartridge case is the only thing between you and 40,000-65,000 PSI. Think about that for a few! loosing your eyesight from a separated case head or having a total catastrophic failure is like holding a grenade in front of your face!
I am all for using brass to its limits. But you must inspect each piece thoroughly as it is used. Some can last a huge number of reloads. Some will last only 2 or 3. Depends on the case, chamber geometry , the flexibility of the receiver lock-up and the reloading technique. Annealing brass is another technique to add to case life. It does require additional skills and knowledge to do it correctly.
Learn to do it right, first!
I've not had the pleasure of doing business with the company listed in your link.
Have Fun and be careful!
GregH
Heres a link for new Brass that I believe is as good as any;
Bruno Shooters Supply: Brass
as well as;
Midwayusa.com, Grafs.com, midsouthshooterssupply.com, et al! Watch for sales!