I don't own a MRC, but do have a CZ550 in 375 (customized by AHR) and I'll add my .02 on the subject.
What I have learned is that for right around $3K you can get the job done with a 375 in a typical "African" style rifle.
Assuming you buy the rifle for around $1.5K (new cost) and spend about that much having it made the way you want it.
A lot of folks here on AH can do much of the needed work themselves, but I'm not one of those people.
In that instance, you could save a good chunk of change.
Move up to around the $5-9K mark and you will avoid most of the post-purchase gunsmith bills.
For that price you will have a barrel length you want, quarter rib, barrel band front sling swivel, express sights, FO front hooded sight...etc.
Makers like Dakota, Cooper, Jarrett all have options like this, along with American Hunting Rifles who specializes in custom CZ work.
Move up from that and you are in the $10K + range of looking at "bespoke" rifles.
For me, these rifles are but a dream.
They are truly beautiful works of art that are custom fit to the owner with engraving and wood that are truly amazing.
It depends on your budget and what you value most.
You can spend time to make your rifle the way you want it, or pay others to do so.
MRC is under new ownership now and is correcting a lot of previous problems.
They are moving in the right direction from what I have seen and I would not hesitate to buy one of their new products.
Best of luck with your decision.