New Turbo and Other Fixes

I have a 2000 S4 that the turbos have gone on. After talking to my tech I have decided to put in the K04 turbos. I was told they are a bit bigger and as far as up grades and options down the road they are what I want in there. If there is any thoughts on that I would like to hear them.
Currently the car has a Stage 2 chip, upgradded exhaust, short shift transmission, upgrade ralley grade cats, stiffer sway bar in the rear and upgraded clutch.
The K04s plus other parts and labor are going to run me about $5,500 to get installed. Is there any other modifications or parts that I should be considering at this time. Since the car is going to be so torn apart is there anything else I should be talking to my tech about having done right now? Potentially things that I will want to do later but with the car in this state they will save me some money on labor because they will be an easier part to fix.
I am also looking to the future. I plan to keep the car for a while and as I have more money make some more expensive upgrades. According to my tech I will need to upgrade the brakes before I do anything else. Is this something that I should look at doing right now with the turbo upgrade and the bit of power it is going to add?
I have full faith in my techs advice but am looking for other ideas and thoughts. Also just trying to education my self as I have minimal knowledge about cars.
Thanks in advance,