I would like find something that will be up to the task for the equipment involved, but not thinking to go too expensive at this point as I can always upgrade later.You might want to consider using Mogami Gold Studio, at least initially. If you search the term "Mogami" in past threads here, you will find more than a few people having high quality systems who reported being surprised at how well it compared to vastly more expensive cables. Also, fwiw, it is widely used in pro audio applications.
To the extent that its sonic character may depart from neutral, based on anecdotal reports it would probably be SLIGHTLY in the direction of providing a relatively relaxed presentation, as opposed to one that is hyper-detailed. The degree to which that occurs probably depends on the output impedance of your preamp at high frequencies, for which I couldn't find data. But its specified nominal value of 200 ohms (presumably at mid-range frequencies) is low enough to suggest that is unlikely to be a significant issue.
Regards,
-- Al