Good choice for 20' XLR cable?

I'm thinking of moving my equipment rack to a side wall. If and when I do that, I will need a pair of 20' XLR cables to go between preamp and amp. I do not want to spend more than $1,500.00 for the pair, hopefully much less for decent quality. New or used is okay for me.

Do you have any thoughts or suggestions regarding a particular brand? 

Thank you.