I'm a great advocate for narrow over wide grapples but honestly the difference between a 48" and 54" is bupkis. I'd get the 54" without a second thought if it had an advantage (such as opening size) over the 50" or a 48". If my loader max lift was less than 1200lbs or so I might be on the fence regarding the very lightweight vs 54" but with a loader with more capacity than that I'd go for the greater opening size and never give it another thought.
And, if anybody just "has to have" a 48" with six evenly spaced tines and wouldn't mind a well used ten year old battle scarred but fully functional Millonzi, give me a holler. I'd be happy to sell you one and will then turn around and buy the EA 54 the same day.