Seandtaylor99,
I have the same digital front. Marantz CD 67SE is a fairly decent player. But a proper set up Lenco blows away the Marantz and Monarchy. I had the stock Lenco arm and Shure V15 IV. It sounds rich and full. The Lenco does have some pop noise occasionally. Digital is quieter. But Lenco got all the music. Remind you Lenco can be bought for $50. I cannot comment on Rega P3, which I never had in my system, though it's a reputable entry-level player.
Analog requires patient and knowledge to get the most sound out of it. You need a RCM, and bunch of maintenance kit to keep belt, bearing, and cartridge in the top-notch condition.
Analog is not for everyone. But if you are the type of tweaker, join the dark side.