Rega P25, would it sound better than my CDP?

Sorry Agent, from your original post it sounded like all of this was new to you. It sounds like you are well on your way to discovering vinyl heaven.

I also hate to point this out and embarass you, but wayyyyy is actually spelled waaaaaaaaaay :>)

Repeat after me: "My name is Elizabeth and I am a Vinyl-holic."

Mind telling us where your "local area" is so we can shop there too? I guess L.A.

That is a lot of vinyl. If each record is 35 minutes long and you listened 4 hours a day it would take you 4 years to listen to every record.

To the original question; a moderately expensive vinyl rig based on the P25 with a comparable cartridge and phono stage will reveal things that even the most expensive CD player can't. However, as pointed out, whether you consider that to be superior is up to you. My vote would be yes. In my experience vinyl is the superior medium if you are willing to spend the time with the requisite maintenance.

Bear in mind that you will need to consider:

1. purchasing a cleaning machine if you intend to purchase used vinyl and it is still good to have with new records,
2. the ongoing debate over which fluid and machine and technique is the best
3. new vinyl is expensive and used vinyl will result in a number of rejects due to imperfections not visible to the eye,
4. for some records there have been a large number of pressings and some sound significantly better than others,
5. you lose the convenience of a remote to change/skip tracks
6. you have to flip the record halfway through the album,
7. you can become obsessive and continuously fret over whether you have optimized all settings such as VTA, tracking force, azimuth, etc.
8. records are much more easily damaged than Cd’s, there is no error correction for records

Other than that it is the perfect medium.

Agent193, listen carefully to Stylinlp's advice. You can't assess the difference between the 2 media on the basis of a few records played on a cartridge that isn't broken in and possibly improperly set up. I don't know about the others but LZ II is not a great recording and therefore not a good tool for analyzing your system.

Everything you described will change as you change the set up and what it is sitting on. You can't just plunk in a new cartridge and have optimal sound. Does the Rega have adjustable VTA? If it does is it properly set? If not the Benz might not be tracking properly. Are the VTF and azimuth optimized?

The difference in detail and resolution you hear could well be the edginess of digital playback vs. a cartridge that is not broken in and needs to be adjusted.

It takes time, money, and a commitment to learn about set up to get vinyl right. Once you do it is clearly the better of the two. IMO Those who say CD is as good as vinyl have never heard a first class analog rig properly set up.