Having BTDT with multiple setups on multiple Audis, including now our B7, I'd rethink your insistance on CO's. Nothing against the Stasis SS's, which are just a well tuned Koni setup, but with the difficulty in changing settings, and the real world against you, you're not really going to be changing ride height once it's set, you're just not. You want comfort and an optimized ride height. You want it to work well in all weather conditions. Get a Koni FSD/Eibach pro-kit, designed to work together, and also with excellent forums feedback, not only on our car, but on this and other forums. Shox.com and other sources. Cheaper, and an excellent balance of comfort and sport, kinda like the car itself.
If you're looking for adjustability because of looks, can't help you there, it's probably not an optimal ride height just because it looks good, and you don't want camber issues. If you're concerned about ride height because of snow, don't be. Have had multiple A4's and other Audis through all kinds of winter ugliness, and have found that the most important factor by far is the snow tires you're riding on.
To give you some idea, the Koni FSD/Eibach pro kit has a generally more comfortable ride than the stock suspension, and it's lowered, which should generally worsen the ride. Of course it also has better control of rebound characteristics than the stock suspension. It is slightly lower than the OEM sport suspension, and slightly higher than the H&R setup, which looks good, but some owners have said is a bit too low, especially in back.
Again, nothing against the Stasis tuning, but you're definitely paying for their name. They're Konis too. If I were going to get Stasis, I'd really get Stasis, and go for one of their higher end kits, which are amazingly well built.
On your other question, the sway bar, I again opted out of the forum Kool-Aid, and went with the S4 bar. No, I don't think the 2mm different RS4 bar is that much better, but it's not the cost that stopped me. There is a reason that all A4s don't come with the RS4 bar, and that is because they need to perform in all conditions, not just "racing" conditions. In real life, it's not all about "dialing out the understeer". That's what keeps your rear end from coming around. Some of the terrain around Pittsburg is not that different from out here in Oregon, and you would be wise to consider what a stiffer rear end (RS4 style) would do coming around a curve on a snowy hill. Yep, you'll be wishing for a little understeer right about then. I opted on the S4 bar as a happy medium, and haven't been disappointed in the least.
Lots of good info here on the forum, but just keep in mind that about half of those here in the Land of the Sick and Phat hail from Sunny (earthquaking, mudsliding, smog/housing price/traffic&CHP-choked) Southern Cal, where the breasts are unnaturally large, and many of the brains disappointingly small. (No offense CA, it's just true). Very few people here actually get their "murdered out" fancy suspensioned candy a$$es out on a track. Kudos to those that do.
Cheers.
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