Old thread resurrected. There is no such thing as a "brush" caliber. A twig will turn a 338 Lapua enough to generate a miss. Brush guns are typically light, short, and quick handling. The normally use heavy(ish) caliber to compensate for short barrels and to give a good terminal performance from it.
Small and fast isn't all that either. One of the most popular rounds out there today is kinda slow, as it goes. Many of the established rounds have been "modernized" to meet the need for speed, that just isn't all that real.
Yes velocity will shorten flight time, and eliminate some shortcomings, but the shortcomings are still pulling the trigger. Way to many factors to talk about here, that effect flight, but the above isn't all bad.
FWIW, I have never heard a negative about the Sako, other than the price tag. I have a $400 Thompson that I'd put it up against. The Thompson has a lot of features I like, the reason I bought it, but is a tad on the heavy side. Not a deal killer with my rather recent addition of recoil sensitivity.
Since this is so old, have you made your purchase? What did you land with?