Binding post replacement suggestions

Trying to keep price around $100 for a set of 4 post. Did not realize there are so many materials and coatings involved in binding post. Looking at Cardas, WBT, Vampire, maybe furutech. I don't mind cleaning post ever so often if I used all copper with no coating post. Any suggestion best bang for buck post that will not alter sound just provide less veiled sound without having to solder speaker wire straight into crossover wire, thanks