Those 04 light bars don't exactly get great reviews. Given the MS261 is a pretty small and light saw to start, I'd probably just stick with a standard bar. I also think the stupid graphic on the 04 light bars looks like something that only belongs on a woman's kitchen apron, not a chainsaw, but maybe I'm too vain.
Note that it's set up for .325" chain from the factory, not standard 3/8". That's not uncommon for small saws (< 50cc), and novels have been written on the pros and cons of each, with more opinion than fact in most. There's a tradeoff between kerf width (narrower on .325", saves HP) and number of cutters in the kerf (higher on .325", wastes HP), which probably makes the .325" faster on small stuff, but slower on big stuff. There's also a lower horsepower limit for .325" chain, before you risk it failing, but an MS261 will never violate that.
That said, your intended use dictates the suitability of the saw, more than anything else. With a 16" x .325" bar, the thing probably rips pretty well, but you're limited to never cutting anything much over 30" diameter, working from both sides. And you're going to be slower in anything much over 15" diameter, not just because of cutter count in the wood, but just because all saws running near max bar length slow down a lot when buried nose-deep. I suspect the higher number of cutters (over 50x for 32" exposed loop) on the .325 will only make that worse when buried nose-deep, versus standard 3/8" (~34 cutters) chain on the same size bar.
One other factor I haven't seen anyone mention is sharpening. If you're cutting clean wood and never "ground" or "rock" the chain (hitting the ground), you're still going to want to sharpen it after every 2 tanks of gas, to stay in peak cutting condition. If you're an amateur, figure double that to start, because you're probably going to hit things that dull it more quickly. A .325" chain is both more tedious to sharpen, at each cutter, but has 15% more of them per inch of bar.
If you never cut over 30", and most of your cutting is under 15", then this may be the perfect saw for you. But if you find yourself cutting larger stuff, you might want to step up to an MS36x. It's been said many times on many forums, that the 63cc 036/360/361 is the ideal firewood cutter's saw. I keep an 036 Pro as the "middle" saw in my 3-saw lineup, and can vouch for that particular vintage of this popular model, as being a real nice compromise between weight and capability for a lot of firewood cutting requirements.