If you enjoy working for the company where you are right now that’s got a good culture and you get treated respectfully, sticking to SH with them if you see a future there for yourself is not exactly a bad idea too.
Money is only part of the equation. Moreover you’d get a reasonable pay raise after you get your Command which should come a lot quicker than flying LH, and there is no doubt that it is easier and more enjoyable to work on the LHS compared to the RHS. A lot more sectors on SH, but doing them as a Captain is hardly a chore.
You’d still flying a modern Boeing/Airbus. I have close friends who are on the widebodies after doing SH, and they all agree after a year or two, as many others here have alluded to, it is just another aeroplane and the view outside the window is the same. Personally I really do enjoy flying into smaller, more challenging airfields or shooting a visual approach as opposed to sitting for many hours only to fly an ILS approach most of the time at the end.
At the end of the day for pilots, it is almost always just about money and roster (which translates into lifestyle). You’ll have to find the right balance that suits you and your family.
W.r.t seeing the world, why not do it whilst you’re on annual leave with your family on your own terms?