Hmmm! Friendly sale guy upselling? That's what they are there for!
Hmmm! Rode my mtb on a paved trail. only 240 but when I hit 20 mph, the front end floated around on the Rockshox front fork so I can see where he's coming from. Kind of like driving a speedboat.
Hmmm! A guy form the other fourm just fell on his face cause he forgot to unlock the suspension. Took a jump or bump thinking it was open. He only bled for a little while!
I had a $250 Trek mtb, no suspension. It served me very well. Low end bike but I had replaced the wheels knowing the stock ones were not very hot. But I took it offroad.
I bet either one would be more than fine. But IMO, I wouldn't use the lockout myslef. I'm that kind of person. Doesn't mean that much to me to have fancy stuff that my hurt me....if I forget!