Any ideas for other mods, or best places to get body mods and performance parts?[/QUOTE]
Nice 5er and welcome to the club, bro! As you can see here, I'm rolling in the E60 5 series and loving it too. You might want to shop around at Dinan for some proven and reliable performance parts.
I've only had my Dinan mods for a couple of months now, but heard nothing but stellar things about their overall reliability, performance gains and warranty backing on their product line.
A solid, well earned reputation with over 26 years of tuning experience in N.A. Again, enjoy and welcome!
Fully loaded Dinan Signature S1 Tuned E60 545i Sports Sedan, featuring Dinan high flow intake system, Dinan free flow exhaust, Dinan high flow throttle body, Dinan Stage 3 engine management software, Dinan Stage 1 Suspension System, Dinan front camber plates, Dinan carbon fiber front & rear strut tower braces, Dinan (19") lightweight forged wheelset, Dinan/Brembo Gran Turismo (GT) slotted big brake system, Bridgestone Potenza RE050A RFT's