I don’t know if there will be a price increase with the HL15 2.0, but I kind-of feel there will have to be. If you are explicitly trying to get a HL15 with current hardware and not wait for the updates, you could get some 10GBASE-T SFP+ transceivers to use with the NCTPF.
45HL haven’t confirmed the new hardware, but if you weren’t aware of the upcoming refresh there is a bit of info here on what they had been testing; https://forum.45homelab.com/t/exciting-update-hl15-hardware-refresh-in-progress-community-feedback-in-action/3262. Depending on your use case and budget, it might be worth waiting. That board, if they use it, has two 10GBASE-T ports.
Of course you can always also add a NIC if you didn’t want to use transceivers.