Personally, I've never found the limit of either 090s, a10s or D209GPs in the dry. And suspect that you'd have to be national championship material to do so... I just buy whichever of those I can source the cheapest. Most of the stuff people spout about tyres is a bit questionable it seems to me as there are so many other factors at work than just the tyre itsef. And 'bad experiences' are often down to folks not setting pressures right or factors external to the tyre itself (suspensiopn set-up, track conditions, paranoia etc) - or we're just looking for an excuse for being slower than we'd like to be .

On the road it hardly matters what you use really. Your tyres are never going to be a genuinely limiting factor in that environment I reckon. What you want on the road is something that will give reasonable mileage and has some feel and grip in the cold and wet too. I get less than 2000 miles out of an a-10 or D209GP rear on the road (and only for the first 1000 or so of which would you say the tyre was really working as it was designed to). 090s seem to last a little bit longer in my experience, but there's not much in it at all.

For what it's worth, 090s give me a little more confidence if it's wet (though none of these are ideal in the wet of course), but in the dry I'd take any of the tyres mentioned. In truth I doubt if I was 'blind testing' I'd be able to reliably tell you the difference as so much of this stuff seems psychological to me. I also reckon that, in general, the sun coming out does more for lap times than different tyres at our kind of level...
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Still smoking...