Sorry, hope I haven't left this too late for you.
I have done quite exhaustive testing with the VTR and if my tests prove anything, it is that the previous research and tests performed by others towards an optimum brake is correct. A muzzle brake
should have its ports at either 3 and 9 oclock or all the way around. The link below is a great insight into brake design and effects:
In the VTR, as pressure builds and the brake begins to work, accuracy deteriorates. The effect is worsened with changes to slow burning powders. As an example, Varget was too slow for the .308 VTR I tested (made the brake work) and a faster powder acheived better results- up to a point. Once the brake began to work, groups opened up to 1MOA and greater.
The other aspect is the stock, very soft and flexible on both the VTR and SPS. That said, the longer and heavier barrel of the SPS varmint dampens a lot of vibration, resulting in superior accuracy from an un-beeded stock- not that you should leave such a rifle unbedded. The 26" barreled .22-250 SPS Varmint tends to shoot sub MOA out of the box so I think this will be your best starting point. If you don't like the barrel length, you can have it cut down later. If you get the VTR, you are stuck with the barrel set up until you can afford to rebarrel.
Hope that helps.