For finesse & panfish, 2500 size, for smallies up on great Lakes 4000 size. With the bigger reels now weighing under 8 oz, I like bigger for much better line management.
My spinning arsenal:
three Okuma RTX 30's (panfish)
two Shimano Stradic 2500 Ci4+'s (finesse bass)
two Pflueger Patriarch XT 35's (crankbaits when using spinning)
two Daiwa Tatula LT 4000's (Great Lake smallies)
Notice, I'm not "brand dedicated"?