I have a Savage Mark II JTV that I like a lot. It is the most accurate gun I have by far, and was quite affordable. It differs from the BRJ by having a thumbhole stock, which is comfortable, but not good for left handed shooting. The Jacaranda laminated stock is a bit more colorful than I expected, but it looks like fall camo to me now.
I saw the Mako Shark model first, but found the JTV to be better finished and more appealing. There is a thread at The Firing Line about the Mark II models. They are all well liked. Chuck Hawke also praised the Mark II for its accuracy.
If I were interested in smallbore silhouette competition, I would try to get a tapered barrel and traditional looking stock to qualify for the "hunter" class, and avoid shooting against the very heavy and expensive target rifles.