My tuppence worth would be that since you are looking at this solely for the purpose of retro gaming is to work backwards from what games you want to play.
68k games - probably an se/30. Se's are the cheapest and aren't likely to need an instant recapping, but the upgradable its of an se/30 will play a broader range and it is possible (if blindingly expensive) to find a dos card. Se dos cards are rarer than water on the sun.
If yo just want to be able to play a long range of games on one machine, look at the performas because of the much cheaper and readily available dos cards. Though to be honest if you want to play mid nineties games buy an old pc or emulator - those were apples dark days and every game pretty much was on windows/dos
68k games - probably an se/30. Se's are the cheapest and aren't likely to need an instant recapping, but the upgradable its of an se/30 will play a broader range and it is possible (if blindingly expensive) to find a dos card. Se dos cards are rarer than water on the sun.
If yo just want to be able to play a long range of games on one machine, look at the performas because of the much cheaper and readily available dos cards. Though to be honest if you want to play mid nineties games buy an old pc or emulator - those were apples dark days and every game pretty much was on windows/dos