You could be lucky and needing only the 2 wheels. But, the suspension needs to be evaluated - they are not meant to take sideways impact, hence even a light shock from the "wrong" direction could damage them. I would place the car as is on an alignment bench and test it. If the specs are OK and similar with your last alignment (assuming you have the papers from the last alignment), then you might consider yourself lucky. If it's out, the sheet will tell if only the front, the rear or both are out of spec. At this moment the bill will start raking up.
Looking for a DIY? Parts? Check this out, it might be your ticket
TMS underdrive pullies - Stewart WP - PSS9 - Beisan Vanos seals - Zimmerman cross-drilled & Akebono Euro - Deka 649 MF - 55w HID headlights - 35w HID foglights - Hualigan double din - ACS (rep) alu pedals - Euro central storage console - Breyton Magic Racing staggered wheels - M5 bumper - M5 steering wheel - Tint
Stable: e39 M54, e53 N62 & Tribby