If you have found a seat that you like and it is the pattern of the fabric you are having problems with, go check out the same brand at another store(or check online where another pattern is sold)... I know the one seat I liked had three different patterns offered at three different stores. So pattern A was at Wal-Mart, pattern B at Target and pattern C at Babies R Us and they were all the same function and style of seat, just different fabric, and the price only varried $5.00 between the three stores....
Then the last thing to look at is does it have the options that you like and you know will work for you and your vehicle. If the seat is being sold at a reputable store, it has a lot of standards to pass to be sold, so no matter which one you pick, if installed and used correctly, your precious little one will be safe.