Mean green is the top of the line, but it comes with a high price tag as well. AC/Delco is a normal choice, depending on what you want it to do.
Stock replacement? Bigger amps for extra electrical equipment? off road lights, winch, etc.
With a 2.5L, you would have to go with something aftermarket if you want bigger amps. The mounting brackets are different than that of a 4.0L. Or, if you can adapt the mounting brackets you can get an alternator out of a GC with the V8 and towing package....it's 136 amp. I believe yours is around 60amp?
'87 YJ, 4.2L built and bored, 8" of lift, 8.8 rear, AX15/NP 231J, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...