I spent years printing on Omegas in newspaper darkrooms and had one at home as well. Since getting a 504, the Omega sits under a cover as an emergency spare. I find the 504 controls for raising the head and focussing superior in ease of use compared to the Omega which required some gymnastics on big enlargements. The Devere is used for 6x6 to 4x5 with 35 being printed on a V35 Focomat.
Both are workhorses and will need minimal maintenance 'cept for bulbs.