Used both the Assys and PS2's. I feel from my experience that the Assy is a better wet tyre without doubt, equal dry tyre and longer treadlife.
Had 3 PS2's suffer sidewall damage in the form of cuts from potholes, particularly when it was wet, and for this reason I would not purchase again.
So my vote is with the Assys.
For those who are sick and tired (no pun) at premium brand tyre prices, the Kumho Ecsta KU31's are worth looking at. I have run them on my M3, along with PS1 and PS2 and now Assys, and without doubt the only thing budget about them is the price, they display better wet grip than both the Mich and Goodyears, similar dry grip and good treadlife, most people just will not try becuase of the name. But loads of EVO/Scooby/M3 drivers have switched and rave over them.
Not really heard much about the kumhos tbh.. would be interesting to have a read if you have a link.
Good to know that its not just the assyms that have a problem with the side wall. Would definately agree with the fact that the assyms seem to last alot longer than the PS2's which seem to be a softer compound. Will just have to remember that the Assyms seem to take a few thousand miles to wear in 
Who says PS2s have a softer compound than the F1 Asymmetrics? 
ME!! 
Well by my own experience anyway. PS2 as good as they are, seem to wear much quicker than the F1's.... not by much but a noticeable amount.
Ahh, OK. So you have actually used PS2s before?
Anyhow, when you get a mo, look on the sidewall of your Eagle F1s, and write down and post the following three readings - 'treadwear', 'traction' and 'temperature'. I'll try and do the same with the PS2s and we can compare. 
Here we go,
Mich PS2 220 AA A
Goodie Assy 240 AA A
Kumho KU31 320 AA A
I know cos I have the Assys on the car and the other 2 are mounted on sets of wheels in the garage, hence it has allowed me to really back to back the 3 tyre types.
Taking away any price consideration or perceived advantage due to name,
in terms of wear best to worst:
Kumho, Goodyear, Michelin
Dry grip
Goodyear, 2= Kumho,Michelin
Wet grip
Kumho, Goodyear, Michelin
Now I know I only have the benefit, of actually using all these tyres on my car, rather than making an untested opinion, and I appreciate unlike the mighty RS4's 420HP, I only have a weedy 350HP, but it is only going through 2 wheels, so thay are taking a lot of the strain here, to put the wear rate into context, the PS2's go down to 3mm (I junk tyres then) at 6k miles, the Kumhos have covered 8K and have 6mm left and the Assys have covered 7k and have 5.5mm left.
Now interms of price 4 PS2's in my size of 235/35/19 and 275/30/19 cost £1010, the Assys £628, and the Kumhos £390, these are mail ordered prices, thats how I buy them.
Now, as I said, all my findings are subjective, and are my own opinions, has I have found them in real world driving actually using the tyres on my car, hence that is how I come to the original conclusions that I posted.
Members can draw there own conclusions, but I know what I'll open my wallet for.
Fortunately, I can afford to run any of these tyres, but I ain't going to burn cash on a product that does not perform even if its got the fat guy stamped on the side.
