Snopyro

I know most of you will probably say:
H&R with the Bilstein sports... but I'm looking to not spend too much on the suspension upgrade.

Basically, I want to tighten up the suspension a bit and not 'big boat' over turns. Current wheel gap is acceptable, but I could go down about an inch (with Eibach Pro-Kit springs- which I don't know the part number of or where to get them).

Car is a daily driver, but I don't mind a firm (but not overly firm) suspension. Would probably try to do 1 track day/year, assuming the car is in trackable condition.

With this in mind, what would you recommend me to do with my suspension- cost effectively, and get the most bang for my buck?

- OEM springs with Boge Turbos
- OEM springs with Bilstein HDs
- H&R springs with Boge Turbos
- OEM springs with Boge Turbos
- Eibach Pro Kit with Bilstein HDs
- H&R springs with Bilstein sport
- Eibach sportlines with Bilstein sports

How many miles should I expect out of my OEM shock vs. Boge Turbos vs. Bilsteins?

Koni's and 2B coilovers aren't listed due to price. I know that the last few option setups I've listed will cost the most money.

Can someone give me a site and part numbers to purchase the Eibachs the cheapest?

1991 Audi Coupe Quattro 2.3L

TIA!