1909 Argentines are standard length actions reconed to be well finished and fitted. They should have a hinged floorplate which answers one of your criteria.
Because they are desirable they often command a higher price.
I think that they became popular in the US as in the 60's there were a lot of surpluss ones coming onto the market.
If you are going to scope the rifle then a safety conversion is going to spring you about $400.00 fitted before you do anything else.

Personaly for a shooter that is a joy to look at I would go with the BRNO, strip and polish the action internals. Then file, flat and polish the action to remove the BRNO markings and have a real nice rust blue job done at the same time replacing the rear sight with a nicer express sight. Personaly I would replace the bolt handle with a buterknife (but that is just personal preference.
Get a nice pre inlet semi fancy stock for $ 300.00 and spend the time doing a nice fit and sanding job and then give it to a pro for the checkering and finish.

I am not sure of the price of BRNO's where you are but that lot could get you a real joy of a rifle for $ 1500.00 if you do the time consuming hand work yourself.

I can buy used Magnum cal BRNO's here for Ł 250.00 or so. Most are hardley used as folks buy them and frighten themselves to death for 20 rounds and then sell them. One of those would be my choice.
You can get them in .416 Rigby which gives you your caliber with less hassle then getting wildcat ammo if you travel to Africa.

Regards