The ACD games Black Tiger listed are all good buys. Kabuki Itouryoden is probably the best game that's unique to the PCE/ACD that can be found for a reasonable price.
Battlefield Wrestling sucks.
Quest of Jongmaster looks cool but it's probably unplayable unless you read Japanese.
I like Strider and Mad Stalker but don't pay an arm and a leg for them.
I own World Class Baseball (PL1), Power League 4 and Power League 93. Unfortunately, I've barely played any of them so I'm not much of an authority.
The graphics in PL4 are an improvement over #1 and most of the menus are in English, which is nice. The music in 93 seems to be the best and the graphics are a tiny bit better than #4 but the menus are in Japanese.
I looked them up on PCECP and, for whatever it's worth, PL1 is a 2 meg game, 2-3 are 3 megs, 4 is 4, and 5 & '93 are 6 megs.
Looking at the screenshots on PCECP I'm guessing that PL4 is the last sequel with mostly English menus.