What you just described is exactly what I have in my 4runner. 8-ish:1 compression, T3/T4 turbo ~ 7psi of boost. It has made running down the highway MUCH easier.
The only issues I see with your plan are your proposed injector choice and lack of comment on computer. With my setup I have been quite pleased with my stock 22rte injectors (slightly higher flow over stock 22re, but I can't remember the exact flow difference). I have not, however been as pleased with running the stock 22rte computer - I would recommend NOT using your 22re computer as the fuel/timing maps are significantly different than that of the 22rte. If I were you, and already had to spend money on an ecu, I would look into getting a mega-squirt PnP from the get go (
DIYPNP Nippon Denso 42pin Unassembled Kit). So now you're in it the cost of the turbo kit and the ECU.
For my rig:
Pros:
Will run down the highway at 75-80 mph in 5th gear.
Will climb 10 miles of 7% grade in 4th at 60 mph
Makes pulling small trailers easier
Sounds f-ing awesome
Was/is a great project
Cons:
Low-end torque sucks (this is HIGHLY dependent on turbo selection)
Mileage is not quite as advertised - I haven't seen anything over 16 mpg since my swap
MUST run higher octane fuels
Loss of simplicity of a 22re
Have to monitor things like a hawk - hence the reason I have 5 extra gauges (pyro, boost, oil pres, water temp and A/F)
More frequent oil changes due to thermal breakdown - or move over to synth oil.
So to summarize, if you have the time, ambition and $$$ to do it - do it.