I currently use a lot of the Federal Champion from Walmart for range blasting/practice and informal competitions; in the newer 100-pack boxes it is the least-expensive yet reliable and fairly accurate stuff that I will feed my Glocks. Note on the box says don't use it in ported or compensated weapons, so I don't.
The CCI Blazer (original aluminum-case) and Blazer Brass (brass case) stuff is more accurate and slightly more powerful, but costs 10%-20% more. I will usually use the original Blazer for outdoor competitions, so I won't be concerned about losing brass in the grass/mud/snow (the aluminum cases are not reloadable). I've found the CCI Blazer ammo is the most consistent and accurate factory-loaded 9mm ammo in my Glocks, makes minimum power for IDPA (even in the subcompacts), and it's very reliable. The Glock factory uses it for testing Glocks and providing the fired cases for ballistic I.D. (little brown envelope in your Glock's box). Good stuff, and I'd use it all the time if I could get it as cheaply as the Champion.
I use the double-stacked 100-round green/white boxes of Remington/UMC jacketed hollow point ammo in many of my guns for testing their reliability with JHP ammo, defensive training, and some competitions. It is accurate, reliable, and the only reasonably-priced JHP ammo that I can find locally. I will not use the yellow-box UMC FMJ ammo, as I have seen many functioning problems with it in other folks' weapons, and the accuracy seems to be below average as well.
I have used the Winchester White Box value-pack 100 rounds boxes on and off for many years; it seems to be mostly decent stuff, but its accuracy seems to be hit-and-miss, shooting very well in some guns and rather poorly in others. If you use it, check the rounds carefully as you load your magazines, as many examples of deformed bullets and/or cases have turned-up in the last year or so among folks who use a lot of it.
I won't use imported steel-cased pistol ammo in any of my handguns. Not worth the buck or two per box saved, in my opinion, based on functioning and accuracy problems I have (personally) seen (and also heard of) in some weapons.
"Placement is power" -- seen in an article by Stephen A. Camp
(RIP, Mr. Camp; you will be remembered, and missed)