This is the best thing to ask, ie WHAT POWER DO YOU WANT ?
As a rule go for the smallest turbo that will give the power reliably as you will have the least lag.
T34 and T35 are one and the same, large turbo escort cossie uses a T34, a lot of T3's are modded with a T34 trim wheel on the compressor side.
T2 can go on will give no lag really on an engine this size but will limit power considerably, T25 is used on 2 litre pug turbo's, and the small turbo escort cossie.
A decent spec T34, from a modded T3 with .48 housing(turbine) will have next to no lag, and still do 400bhp all day long.
tabetha