Preface: I don't drive a Bonneville...I do drive another 3800-powered car, though.
I've been running the tires that came on my car since I bought the car in November, 2006. Goodyear Eagle RS-A'*. They're nice tires, and have served me well...they must be quality, considering where they're used. Replacements are $250ish a tire, plus install, balance and alignment, though. The tires have some tread left, and might get me through another summer (would easly do 'sane' drivers another summer), but I bought new Winters this fall, so I figure new summer/all-season tires are in order. I'm not paying $1000+install for Original Equipment tires, so I went shopping...
I don't like Bridgestone and I hate Firestone with a passion. Save yourself the trouble, and don't even suggest them.
Options i've unearthed so far include:
<-- Fuzion ZRi
<-- Kumho ECSTA ASX KU21
<-- Pirelli P4000 SuperTouring
<-- Pirelli P6000
<-- Toyo Proxes TPT
Of those, the Toyos have the second-best treadwear (UTQG of 400 - Toyo will replace up to 100,000km). They're only V-speed rated, though, which is the same as whats on the car now. Not necessarily a bad thing, mind you, just an observation. The KU21'* have a UTQG treadware rating of 420, but according to my calculations, thats only about 50,000km...and Toyo, despite having a lower treadwear rating, will replace tires up to 100,000km. Thats a tad confusing.
The P6000'* can be had in speed ratings up to Y, which I know is overkill. W would be right about my needs...rated high enough that my car will never get there, but it should be able to get at least somewhat close. The ZRi, KU21, P4000 & P6000 are available in W-ratings. The TPT'* are only V-rated.
Opinions are welcome, as are alternatives to my choices. Of the above tires, I've only priced the Fuzions. They're reasonable. I don't know what the others are, price-wise...I didn't want to spend time getting quotes if there was something else out there.
Thanks for your time!