I have run K&N filters for over 2 decades with no problems. I don't think a few bad stories here and there on BITOG are indicative of poor filters or a drop in quality. Certainly if there has been a drop in quality( and I have not seen it ), it is no more significant than any other brand's drop in quality( very few things made these days that are as good as they were even 5 years ago ). They are still one of the best on the market from what I see.
However, if you want to change try the new Royal Purple filter if you have a PepBoys near you. I actually have swapped over from K&N to the new RP filter because it appears to be a better filter. If an RRP filter was not available to me no doubt the filter I would reach for would be K&N.
If RP is not an option for you then a Mobil 1 would be my next suggestion( very, VERY, similar to a K&N ). That would be followed by a Wix/Napa Gold( less mileage on OC however with this filter ).