How to find the good CD recordings?


I'm new to high end audio but have a decent system. One of the things I've noticed with this new (old) system, is that some of my CDs which I used to think sounded fine just don't sound all that good anymore while some of them sound great. A lot of these CDs are 30 years old and came from CD clubs (remember those?) and typical record stores.

I've noticed in particular that some of my Led Zep CDs just sound a little flat and a little shallow while some of the Pink Floyd and Rush CDs sound quite good. 

Is this just a matter of Floyd and Rush having higher production quality from the beginning? 

Would later "remastered" Zep CDs sound better? Is "remastered" always an indication of better or superior quality? Is it just marketing hype sometimes?

Anyway, with this new system I am inclined to buy the best quality recordings of any newer music I buy and possible replace some of my old favorites.

So is there a place on the internet where one can go to get reviews of the actual recording quality and not just the music itself. I don't see iTunes or Amazon as particularly useful here. At this point I am not interested in pursuing vinyl or high end audio files. I'm still just getting my feet wet and CDs seem like a cheap way to do that.

Any assistance much appreciated,

George
n80
jafant, thanks for that info.

tomcy6, Robert Palmer's book (not that Robert Palmer) called Deep Blues has been on my Amazon wish list for a while. 

I have to agree about the quality issue with the older blues. It simply isn't going to be there and, if you go to some blues festivals it is not always about some level of instrumental or vocal virtuosity (although it is often there). It is much more of an emotional and expressive experience.

The festivals are a great place to experience the blues. Many of the local blues greats have children and grandchildren who are in the business now. Cedric Burnside, grandson of R. L. Burnside has a number of albums out (they are technically hill country blues, not delta, but play a lot in the delta). Junior Kimbrough has family members who play as well.

Cedric Burnside is a great live performer.
@rettrussell- Welcome to Audiogon since it appears that was your first post. The recent LZ reissues on vinyl are fine and probably better than trashed old copies found in most used record bins. But, if you compare the reissue to an RL of II (or the UK plum), or to a UK first press of III (or the Canadian TG), you’ll hear a difference. Whether that’s worth the price of admission is another question since the copies I mentioned are expensive if you want to find a clean unmolested player. (the Canadian III isn’t super expensive just not as many of them around with the right deadwax).
I really stop after the first album but listen to the others occasionally. The first album was the toughest for me to find a good sounding copy. The Piros 74 remaster that is the ’fav’ on Hoffman is around and close to great for what it is- market is probably just under $100 for a mint- copy pressed at Monarch. The RL of HOTH is cheap and gettable. The other copies I have are all over the place, some Classic 45s, some Classic 33s, various UK and US pressings from the era when the records were released or remasters done shortly thereafter.
Let me underscore that none of this relates to the CDs- I simply haven’t listened to them. Sorry if that’s a diversion, but to the extent I was contributing to the confusion, that’s my take. The new records are fine, unless you want something better at a price. And, for the most part, you are in collector territory and dealing with condition issues.
@chemman

You have good ears! What Daniel Lanois did on Oh Mercy is absolute magic. I think LZ Deluxe sounds tinny until you crank it! When you crank it you realize it was mastered to be played louder than average. Finally the LZ catalog is highly variable even within the same album - individual songs are great sounding while others on the same album are poor.

For classic rock I recommend a tube preamp to get the most out of it.

Try Nils Lofgren Keith Don’t go live for superb sound.