A few decently priced budget options are:
Corsair CX (grey label, NOT green label), TXM, CV650 (CV <650W is group reg rather than DC-DC, avoid those units), CXM (750W and above has the same internals as green label CX, but you shouldnt be using CXM to power anything that actually needs that much power)
bequiet System Power (U)9, Pure Power 10, Pure Power 11
Coolermaster MWE Bronze
EVGA B3
These are among the cheapest units that are still DC-DC regulated and dont have any other significant issues. Most cheaper units will be group regulated, where multiple voltage rails are regulated together, and when a crossload occurs (for example, when 12V is loaded a lot, and 5V a little), this tied together regulation often causes the rails to go out of spec in performance for voltage regulation.
And if you ever do something higher end (around 2070S/5700XT is where I draw the line):
Corsair TXM, RMx, RM (though this is a pretty loud unit), HX/HXi
EVGA G2/P2/T2, G3 (also can be a loud unit, thanks to the poor fan curve)
Coolermaster MWE Gold
bequiet Straight Power 11
Enermax Revolution D.F.
Bitfenix Whisper M, Formula Gold
Seasonic Focus, Prime
These have more protections than the aforementioned budget units.