Purchased a 2004 LE V6 Camry used. Already have a 2001 LE V6. '04 model has a different body style that is vastly quieter and somewhat larger. The 04 was the first year for the 5 sp auto on the V6 and improves mileage on trips and decreases noise at high speeds, but the transmission shifting is much worse (and erratic) in the city than my 01. All TSBs have been applied. Dealer indicates it is operating as designed. Transmission also now requires Toyota fluid (vs Dextron 3 for 01). Ride seems somewhat smoother, but this is less noticable than the improvement in cabin noise. Rear doors are longer, making exit/entry more difficult. Trunk went from large to absolutely huge.
Haven't tried an 05 or 06. I suspect the transmission shifting issues have been improved in later years.