This is my 04 Avy, got it in September of 05 with 8900 miles.

I can't stand the stock look, so i got some RVM 22" with 305/45/22 kumho tires. also installed bug shield and window vents and billet grill. I first installed a Jensen flip out indash monitor with dvd/mp3, but as any avy owner will notice that the shifter gets in the way. so i got a double din 6.5 jensen monitor with dvd/cd/mp3/tv tuner/sd/touch screen head unit. Alot of people are too concern about name brands but for $525 on ebay, this is an excellent buy and the resolution is excellent. i also installed a 12" flip down minitor. i just purchased two 7" headrest monitors, not yet installed, and jl audio amp and two 10" kicker vr comp subs that's also waiting installation. i also installed woodgrain dash kit, made the interior very classy and give that luxury feel. As far as engine, all i've done so far is K&N intake system. Future plans will be exhaust upgrade and lowering kit, maybe 2" drop. hope you like it as much as i do.
