We claim the ornamental design for a beverage system with aeration, as shown and described.
FIG. 1 is a front view of a beverage system with aeration showing our new design;
FIG. 2 is a top perspective view thereof;
FIG. 3 is another top perspective view thereof in open position for bottle installation;
FIG. 4 is a side view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a top perspective view thereof showing the dispensing head and aeration system enlarged and the rest of the body removed for ease of illustration; and,
FIG. 7 is another top perspective view thereof enlarged and partially broken away for ease of illustration.