I'm already struggling to make payments for the above choices.You are making payments on the equipment and you don't have it,what's up with that?
You will get many different opinions on what percentage to spend.I have read anywhere from 5% to 20% of the total system cost.I went to the lower end of that range but,that's just me.Then you've got to figure out how to allot that money to each set of cables.Don't forget,you also need to figure out what characteristics you want from the cables.Isn't this fun? My advice is to figure out how much you are willing or able to spend and post that figure.That way posters can give you better ideas.