Hello mate.....I had the same discussion with a supplier just 3 days ago.
I have been reading reviews on both scopes and chose the LX90 ACF with GPS.
Why not the LS8......It can't be used without power. There is no way to manually operate it. Has to have batteries or 12v external juice plugged in to be able to use it.
On the other hand, the LX90 can be manually moved through both axis, without the need of power.
No doubt the LS8 would be a great GO TO Scope....does everything for you and is aligned in around 9 min's and your ready to go
If you decide on the LS8....get yourself a decent 12v power pack that you can keep charged.......or go and see your father.....

for a raise in your " pocket money " because, the review says , 3 to 5 hrs.....

on a set of 8 x "C" Cell Batteries.
Hope this helps towards your decision.
Colin. BTW.....I wish someone would give me $3,000. .....