Tough call.
.com drives .net prices, and both have seen sharp growth recently in valuation in the 3 letter marketplace. You'll have plenty of .com buyers for any combo...though it may be a tough buy to find any 3-letter .com at $2k. The premium 3 letter .net might be a tougher sell, but possibly a higher percentage return sale when your able to get it sold.
I think you could win nicely either way and I wish you good fortune with your upcoming purchases.
Thanks,
zesty