[200q20v] virgin audi owner

[Tiberius Gaius]

Hello; I expect to complete the purchase of a 1991 Audi 200 Quattro wagon this week.  I was wondering if anyone can tell me what would be the critical items to service/inspect at 116,000 miles (current mileage)?  I drove the car about 10 miles at pretty high speed; boost hit 1.8, brakes feel good, steers straight (very light steering but I think that has been complained about before on Audi's by car magazines), interior in nice shape.  Paint covers the car but the car needs paint to look real nice; no rust.  All of the metal hydraulic lines just recently replaced, power steering pump; looks real new in the engine compartment in that area.  The original steering rack is in the car.

I do intend to take the car to an experienced Audi mechanic; any words of wisdom for me?  

Also, performance; this car has a TAP chip installed; what else can be done to increase power without spending major bucks?  Can the boost be increased a bit without hurting the engine?

Recommendation of place to buy lower springs and shocks?  I am putting H & R springs on my 911; use those for the Audi, too?  Bilstein heavy duty or Bilstein sport shocks?  What about wheel size; the stock BBS wheels are scuffed but serviceable but I expect I'll switch to 16 or 17" rims when the current tires wear out; recommenations?

Last for now; where does a person purchase euro headlamps to completely replace the stock units?  I thought the lights on my benz were bad; they are great compared to the audi!

Thanks for taking the time to help me out.

Carl
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