Worker,
To address your question about rifles - I need to qualify my remarks some. I do not own any heavy varmint rifles, the heaviest I have is my Cooper Varminter, when scoped still only totals 9 lbs. My favorites that I have owned through the years have been what would be called walking varminters, a sporter style stock with a sporter or slightly heavier contour barrel. The heaviest ones I have ever owned were a couple of the old Rem 700 Varminters, which is the Rem heavy barrel in a BDL walnut stock, even they weigh less than 10 lbs with a scope though. But, generally I go with a sporter or magnum contour barrel because they swing easier, come to target quicker and are easier to carry.
I will not carry, or own, a rifle that does not meet what I consider acceptable accuracy for varmint hunting. My criteria for acceptable accuracy is 5 shots into less than 3/4 of an inch consistently, if it will not do that then it is gone.
Based on the rifles in varmint calibers (204 thru 243 calibers) I have owned this has been my experience.
Remington - I have owned somewhere around 20 Remingtons bolt rifles, the most accurate overall, and easiest to get to shoot were the Remington 660 carbines, or the cheaper version of them the Mohawk 600.
The 700 Remingtons in various configurations have always been a hit or miss proposition - some shot well, some I never could make shoot to my standard even after having a couple of them trued. At a minimum plan on a trigger adjustment and more than likely a bedding job on them, to my recollection I have only owned one met my criteria of consistent 3/4 inch or less groups without some bedding work.
Savage - As I mentioned in my earlier post, I only have experience with two of them so the jury is still out but they have my interest up.
Tikka - I have owned 4, one in a varmint contour (too heavy, and long barrelled for me), and three sporters. They all shot 1/2 inch groups our of the box, trigger adustment to 2 lbs was a snap, nothing more than taking the rifle out of the stock, putting an allen wrench in the adjustment screw and backing it out as far as it would go and in each instance I had a 2 lb trigger that easily.
The down side of the Tikka is the magazines only hold 3 shots, but the most frustrating thing is that the ejection port is very small (which no doubt adds to their accuracy), but it is almost impossible to single load through the ejection port. Another downer is the magazines are expensive, around $65 dollars the last time I checked.
Where you are going to be hunting, what type of hunting you plan on doing, what type of terrain you are hunting should all be considered in your choice of rifles and calibers. If you are going to use it as a walking varminter you may well be better served by a lighter barrel contour, if you are doing stand hunting then a heavier rifle is not as much of a concern.
Depending on the size of the game, if you are doing shots under 250 yds then a 204 or 223 may well be the caliber that will work for you. A great advantage to them is that you can see hits (and misses). If you are concerned with shots over 250 yds, particuarily at larger targets, then you may want to step up to a 22/250 for the additional energy delivered at the longer ranges.
Deciding which one maker and caliber you want is half of the fun.
good luck and good shooting - drover