I'm guilty of building a decker with overclocker, and perfect time positive qualities, with a 9 agil cyberarm for gunfights. I went with the Microtronica Azteca 300 for 200k¥ and can't see any value to purchasing a more expensive deck during char creation. PT allows for attribute swapping cheese and the Azteca 300 saves 145k over the Sony CIY-720 (allowing for a 4th program) or 131k over the Shiawase Cyber-4. As an AR decker, data processing has decreased value as it's not setting initiative, so modify matrix attribute for 4 packs of parts sets array at 8521, for data spikes overclocker allows the 8 to become a 9 and use virtual machine (decryption, hammer), fork, and configurator (defense) to swap back and forth between attack and defense modes.
Much of the time is spent with attack at 1 and sleaze bumped up high for security. Smoke and mirrors 5 cheese is also coming into play here.
With that as a benchmark, my upgrade cheapest option to obtain a higher maximum stat in the array is the Xiao MPG-1 at 302k with 13R, which is a huge expense so I don't anticipate it actually occurring during the life of the game.
I would absolutely love some sort of modular system (as some outlined previously in this thread showcase) that allows tinkering with the device based on hardware and other skills, and sets costs for increasing attributes based on current levels and such.
Refactoring the costs of the existing cyberdecks based on whatever formula and allow the decker to tinker with their hardware to incrementally upgrade it. Seriously, almost nobody games these days on a pre-built Dell or HP or whatever. Anybody serious builds their own system to their specifications. Deckers absolutely need the ability to do this, otherwise they might as well be called Script Kiddies.
And to (somewhat) firmly answer the subject question, cyberdecks should cost less than they do now. How much less? There's several good math reviews in this thread. The deck needs to NOT cost so much that loss of deck is equivalent to loss of character, to allow for low money street scum or go gang decker's to exist, and to remove the shadowrun of "steal a cyberdeck" as a reasonable in-game goal.
I'd also like to see programs overhauled, both in price and scope of effect. There's a huge number of programs at present, that are cheap enough to just take them all, yet only a tiny handful of them have any actual gameplay value.