All good choices.
I don’t know anything about Brownings.
Tikka has a large following so they must be doing something right - on average they shoot better than most, which is probably the main reason for their popularity. I don’t care for the plastic parts and the relatively fragile cocking knob that seems to get bent when disassembling the bolt if not done correctly.
I shoot a Christensen Mesa 6.5 PRC barrel on my Remington action and the profile is ideal for an accurate light mountain rifle. These barrels shoot well. Since it’s a clone of the Remington 700, the design has been proven and tweaked for over 70 years - the reason it’s the worlds most popular bolt action design is it works. Being the most copied basic design also means there are more options for stocks and aftermarket triggers than any other. You’ll hear a lot of arguments for the factory trigger and against the Remington, but any factory trigger should be replaced with a smoother and lighter aftermarket unit. Don’t be fooled by guys simply replacing springs - the entire factory trigger needs to be replaced on any rifle of any make.
If you had a 243 or 6 creed next to a 6.5 PRC in the truck and a javelina, coyote, rock chuck, prairie dog, or just a nice looking rock to shoot, I would always bet lunch you’d grab the 6mm first. 6.5 or 7 PRC are better hunting cartridges, but they aren’t as much fun to shoot as something smaller. Same thing applies to shooting steel plates at the range - bigger cartridges may be fun to shoot a few times, but 90% of the time you’ll reach for the 6mm. It’s a universal reaction that goes back well into the 1950s when a guy with a 270 and 243 wants to clobber a big varmint of some kind or just plink. If you already have a 6mm and want something bigger go with the 6.5 PRC, if not, the 6 creed or 243 is a much better base to start from.