I started in a similar spot with my 6.5 CM and totally get the budget part—been there. Between the two Vortex options you mentioned, the Crossfire II is decent for beginners, especially if you’re sticking to under 300 yards. If you ever consider something a bit more versatile down the road, I’ve seen some solid feedback on the Gunnr Odin 1-8x24 LPVO—nice clarity and doesn’t break the bank. Good luck out there, and enjoy the hunt!