Use the coinmarketcap site for such details and use the exchanges for trading purpose, there are exchanges which is giving the details you are looking for but how do you end up getting those altcoin in first before even doing basic information about them?
I'm mining, not investing, thus I want to find some new (preferably obsure) coins to play with. That's why I specified that I didn't want any ERC20 tokens. I currently have 166 coin clients installed, but most of the blockchains are dead.
I'd prefer to find an exchange I like and work backwards to see what coins they have available, rather than find a coin via a third party then figure out the exchange(s) to use for it.