There are more things that would be small and close that you should be able to see than just your computer. So, to me, "get a bigger computer" is not the answer. Get suitable lenses in your mask is the answer. Then you can use whatever computer you want, plus read your SPG, read your buddy's SPG if they need to show it to you, read everything on your camera/GoPro, actually see the nudibranch, etc.. I've had 100% solid results from using Hydro-Tac stick-on reader lenses ($15 at Wal-mart), but now I use masks with gauge reader lenses built in (because they fit my face better than the mask I was using before, with stick-on lenses).
I strongly prefer a wrist computer and wireless AI. I have no High Pressure hose coming off any of my 1st stage regs.
But, I'm starting to feel like, if I DID put an actual SPG (on a HP hose) on my 1st stage, I might as well just go with a console unit and dispense with a wrist computer altogether. I like having my tank pressure and NDL (and depth and time) all displayed in one place. Having to check depth and NDL in one place and then check tank pressure in another seems less safe. Too easy to check one and not the other. Less efficient if you always check both. If I am using a physical SPG, then having my computer be in a console along with it forces me to at least put ALL the numbers in front of my eyes any time I check ANY of the numbers. Whether I pause to comprehend them all is a different subject.
I guess I'm saying, you can't really go wrong, either way. But, of the 3 options (Console, Wrist w/wireless AI, SPG+wrist computer), the only one I personally would rule out is SPG+wrist computer. Some people will choose SPG as backup plus wrist computer with wireless AI. But, FOR ME, that scenario means the SPG is adding multiple extra failure points for no real benefit, so (to ME) it is the worst of all options.