I feel your pain with regard to money, putting up with defects & wanting the 'right" rifle...& im not even in the market for my big custom pet jobby yet...
Firstly, beware of that marksman fella--he'll have you in love with a rifle & cartridge before you know it...!!...
As an example, ive never wanted a 270 let alone in a magnum--but now i feel as though i need one...
But seriously...
Im gathering youre like me & dont really know a lot about everything that is available to us out there, & what actions are worth it & what arent...so to educate yourself on the history of actions & everything related to make the right decision will be almost impossible, & certainly overwhelming...
So another way to approach this to avoid an almost impossible overload of information, is to just wander through used guns & have a look at whats about...when you see something that looks good, as the question...
For example...a couple of years ago i wanted another 22-250 & there was some disscussion on here about an older Parker Hale action that was apparently a good action to build on...next thing one came up on used guns in 243, almost mint condition, one owner & was only $400 odd bucks...so i rang & missed out by less than 5 mins...
(i remember i thought it was marksman who bought it because he laughed at me for missing out...
)
So maybe instead of agonising over deciding on a specific fancy action, like GQshayne also mentioned, just choose a rifle that you like/like the look of as you see them become available & then ask the lads "what about these".
Also, maybe be prepared to send the rifle interstate to known & recommended gunsmiths to get the work done--& maybe even enlist the help/services of a genuine expert when it comes to finding & tuning a load, & all the prep work for brass etc...(im not for a moment suggesting you cant load ammo mate--i hope you know that
but if you are like me, sometimes i shoot i great 3 shot group that prints an inch, & other times i shoot 3 shots without a care & they all touch--& a great deal of that i feel is in the intricacies of loading)...
Having seen the results from what were pretty standard factory actions of guys who really know how to tweak rifles, both on here & from one or two bench resters at the range, (although in my experience, the latter are not often willing to give away very much detailed info to help) im a big believer that you shouldnt have to spend big bucks to get a really nice rifle that is super accurate & a pleasure to shoot...
Taking marksmans example is a great example of what i mean...his costing & how that rifle shoots is amazing i rekon---& thats exactly the route i intend to take when i embark on what you are wanting to do now.
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My suggestion would be to start by narrowing down to a couple of cartridges that you think you'd like...
With that...make a list of basic features you want in an action...(short/long, top feed/only mag fed, known reliability of recoil lug system, suitable trigger availability & the ability for them to be tweaked down to your desired safe pull weight...etc etc...)
As i said, as options pop up on the gun sites, ask away & you'll educate yourself as you go along, instead of doin the info intensive cramming of knowledge.
Im keen to see how you progress mate, so i really hope you keep us informed as you progress through this (to use the modern popular term) "journey"
Cheers Big Ears...
The man who knows everything, doesnt really know everything...he's just stopped learning...