Is a Geissele MK14 handguard plus a drilled and pinned gas block worth $200 extra ????

Well, the handguard is $225+ from Geissele. Pinning a gas block gives you a pretty solid set up.

Personally, I think its a fair deal for an assembled upper.
 
Their handguards are some of the finest you can buy.

They copied the design from the HK416, but its about as solid of a lockup you can get.

Don't waste money on PSA trash guns, BCM has a bunch of uppers in stock right now. Its like putting a Tanget Theta on a savage.