OP, I don't see you going from that Kimber .284 to anything at Trade-Ex... you are going to be antsy with any Husky etc... Oh, they are good solid rifles, just very (too) different from what you are shooting now, although they do both go "bang." I think the whole "thumper" concept is defunct, although I am just as guilty as anyone for perpetuating the idea. Any cartridge with sufficient energy and an appropriate bullet is capable of being a "short range" or "thick bush" hunting rifle. Having said that, I do have a fondness for .35 cal cartridges, I like the bigger bullets that they throw, but not for some misguided belief that they can "cut brush" all the way to the target... I just like the effect of a big bullet at decent speed on game animals. I don't think that you need a second rifle that does essentially the same thing in the same way that your .284 does... so I think I would personally create a different shooting experience for yourself with this second rifle. I would look at .30 cal to .375 cal rifles, heavier than your Kimber, but compact and handy, and shoot 200 to 250 grain SP's out of it... top it with a Leupold VX-3 1.5-5X20 or perhaps a VX-R 2-7 giving you crosshairs and red dot options. Any cartridge .308 and up offers 200+ grain options and in reality a 200 grain SP from a .308 is essentially the same as a 200 grain SP from a .358... and it is much easier to find a platform in .308 if you want to buy off the shelf. Really this all points to a rifle like the Ruger GSR .308 Win... loaded with a 200 or 220 grain SP or RN it gives you the experience you are looking for, right out of the box.
I shoot a pair of Ruger rifles in .358 Win that fit the bill, but are no longer made and would be difficult to source... these are the M77 MKII Frontier with 16.5" barrel and M77 MKII RS carbine with 18.5" barrel.