You’ve been recommended full bikes for the price you were prepared to pay for a frame.
I notice "XC" is one of your tags – maybe you’d want something a bit lighter than a Pitch or Prophet.
120mm forks on a Pitch would materially alter the ride characteristic (drop the BB about half and inch, steepen the headangle by a degree). Having said that you can buy the whole bike and keep the forks.
Have tried both the Pitch and Prophet and both are brilliant. I thnk the Pitch can keep a cool head in a more serious situation, but the Prophet is more than capable and quite a bit lighter.
Thanks for the replies. I started to get complicated, what with my old forks being to short in the travel and wheels needing new hubs, so I have paid a bit extra and ordered a complete Prophet 1. I’ll have a bag of bits from the wrecked bike that I can use to upgarde my old hardtail.