Okay, first off, congratulations on the fine new Modern Sporting Rifle, Tex! If you want Magpul furniture, it's easy to change out (even the handguard) and there are a number of different options. Enjoy shooting the new gun and let me say I foresee a second MSR in your future for the wife!
Big Muddy, the price difference on the two you listed is the monolithic upper on the mode expensive one. That's "super cool" but I don't think I'd pay an extra $1100 for such. The first one you listed is a very good, highly serviceable rifle which will be fun to shoot and last you many years.
Now I'd also suggest folks who can go ahead and drop some coin (about $100) on a stripped lower and a stripped upper, and store them away. Spend the next chunk on a barrel. Then toss a few bucks each month gathering things like lower parts kits, stocks, grips, and other small parts. It will be insurance against the potential ban (which I fully expect won't come until the next democrat president (God help us!) but prices are already going up and are going to go up more shortly, until this current liberal crisis rights-grab is over.
If you're not writing letters to your representatives and to companies who are abandoning the NRA in political cowardice, you should be.