Does the warranty (and upgrade pricing) transfer to a second owner, or is it a warranty only for the original owner? Does it require proof of purchase from an authorized dealer to use the warranty?
An extra $170 is completely wasted if the user is never going to get any value out of the extra "stuff" the computer offers. For that type of user, it is certainly not a "better value".
And if you really want to talk about value and investment protection, well, first, we need to know if the warranty is transferable and how long it is covered by the warranty, and then we also need to know what the resale value is on a used iX3M 2. I think resale value on a Peregrine is probably pretty high (as a percentage of purchase price).
If you buy a Peregrine, sell it later, and then buy a Perdix 2, how much money would you end up being out of pocket? If you buy a basic iX3M 2 and then upgrade it and then upgrade it again, how much money will you be out of pocket? Obviously, if you buy a Peregrine or an iX3M 2 and never upgrade either one, then you will be out an additional $170 to have the iX3M 2.... for any benefit?