My first bimmer, not to be my last. I immediately was bitten by the mod bug, and I am slowly turning her into a one of a kind. The best performance mod so far has to be the suspension upgrade. I replaced the stock spring/damper combo with Koni sports adjustable dampers (shocks) and Eibach Sportline springs. Pretty easy to adjust and still comfortable as a daily driver, and in 25 minutes with some adjusting, ready for a autox or track day. She dropped 1.9" in front and 1.7" in the rear - a slight rake, perfect.

Here's my favorite 'eye candy' mod I've done so far..
Predator Chromium Angel Eyes, with blacked out projector corners. Old E36 euro look creeps into a E46. I like to be different.

Thanks to Jackpot @ E46fanatics for the personalized mini-me pic.

Performance Mods List
Koni Sports self-adjustable shocks
Eibach Sportline springs
Polyurethane RSM's (rear shock mounts)
18x8 TSW 'Sting' wheels(all around)
Toyo Proxes 235/40/18 tires (all around)
ECIS Cold Air Intake
Shark Injector
Brembo OEM Front/Rear Rotors
Hawk HPS Brake Pads
3.46 Differential swap
Eye Candy Mods
Projector corners, Clear sides, and Clear rear lights
Umnitza Chromium Predator Angel Eyes
4500k temp HIDs, corners, and side markers
32% tint (I'm legal..)
Xenon interior lighting
Pinstripe delete
Plans
M-Tech Front M3 Bumper
Racing Dynamics Tornado Sides
UUC cat-back Exhaust
UUC SSK Evo3
UUC Underdrive Pulley Set