Tires and chains/sprockets are easy. Save yourself the cash you'd spend on getting a mechanic to do it and get a nicer pair of tires, or a nice high end chain. It may be tricky the first time, but you'll learn valuable skills that you'll use for the rest of your motorcycling days. If your tires are tubeless it'll be a cinch. Shoot me a PM if you want some tips, or look around on the forums, there must be a how-to here somewhere. You won't need more than a socket/wrench set, a tire lever and maybe a bead buddy if you want to make it even easier for yourself. I suppose if you don't have the time though, this Ted Rosey fellah seems to get some great reviews.
Don't balance the rear.Only problem is you have to balance the tires... do the rear yourself.