I have a Vanguard Sporter in .30-06.
It has a walnut Weatherby stock with the high rollover comb, and a 24" barrel. The Howa 1500 is the same action with the pressure relief holes turned down into the magazine. The barrels are 22" for the similar Howa model, and the Howa stocks are completely different. See which one fits you, which you like.
My trigger adjusted quite well, though it was too heavy when shipped. Unlike Remington, they tell you to go ahead and adjust it yourself, and they tell you how. Not an issue unless you need warranty work done on the Remmie. I can imagine a better trigger, but the stock Howa trigger, when adjusted to my liking, is perfect for field use.
The Howa action still has a safety that locks the bolt down, a good thing for hunting. I say "still" because the action is essentially the Remington 700 design, but Remington changed the safety -- a bad move, IMO. The Howa action even takes the same scope mounts as the 700, BTW. AFAIK the newest Howas have a 3-position safety -- even better, since you can choose to lock the bolt, unlock the bolt but leave the gun on-safe, or take the gun off-safe, your choice.
I really like my Vanguard Sporter. I'm a fan of the Weatherby stock design. It fits me and keeps the recoil off my face.
The Mossberg is a whole different animal. It's fully functional, but it's a cheapened design. That won't keep you from enjoying it, hunting with it, etc. But if you want a really good sporter, the Howa is a top-notch bolt action, as good as any production push-feed gun.