lmt in 308 and scar 17 are two rifles i just won't get rid of. However, for practicality the lmt wins bar none. As mentioned above it's difficult and expensive to get parts for your scar. My lmt is set up with an 18inch barrel and nightforce 4-16 and it shoots lights out. I have so many lmt barrels now, it's getting to the point of ridiculousness. But i blow through a lot of ammo every year, and so yes i shoot them out.
My scar 17 is set up for lightweight work with an acog rmr. Great for running and gunning, but that thin barrel starts to see some POA shift after dumping a mag through it. Also, the other big thing that sucks with the scar, is you buy it and to get it where you want it it needs a ton of upgrades. i did the trigger, grip, handguard, and stock. It took me over $1k in upgrades to get it where i wanted it. By the time you are all done, you are in sr25 price territory. With the lmt, take it out of the box, and it's ready to go.
I really want to get my hands on a scar 20s, previously i was gonna go for 6.5 but with the cost of ammo on 6.5 at $3-4 a round, it's just not practical.