The Winchester Pre-'64 is about as solid an action as you are going to find, assuming you can find one. It's American made and you would search long and hard to find a more complete platform, though it is very difficult to machine and blueprint. In fact, it's hell on tooling.
Gunnut loves him some Remmy 700's, and I can't fade him for his love. He shoots them fair and they have served him well in his poor shooting life.
The Howa 1500 is a relatively "new" rifle action in the terms of whom they are going head to head with in the market. They only acquired their gun building rights in 2000 despite the fact they have been machining and manufacturing all sorts of items since 1907.
In 12 years they have made such a name for themselves all the major stock builders and trigger makers have a HOWA compatible model in their line ups.
They also are the single source for a little company called Weatherby in their Vanguard line, a positional foothold in the American market that a lot of companies wanted. Howa won out. Just sayin'.....
Having got that information out there.....
What are you looking to do? Build a bolt action for hunting? Buy a ready made rifle? Build a benchrest platform?