if your suspension is sorted then a td05/6 hybrid will and can do the job,on my vr4 with standard internals it boosted just as quick as the standard td05 did,going slightly bigger in turbo wont increase lag,what it will do is increase your boost threshold further up the rev range so if you are prepared to drive at higher than normal revs you can get decent results,if you go too big you wont have enough rev range left to work with
a good rev range is vital in hill climbs as well as good low down torque,that can be compensated for with using higher revs but not if you end up with a small powerband,the last thing you want to be doing is constantly grabbing gears to keep it in a small powerband.spend enough money on decent suspension and a bigger turbo wont be needed,and when I say decent suspension I dont mean off the shelf coilovers
stick with a td05 get an after market computer and tune it well for bottom end response as well as throughout the entire rev range,the one thing that limits most track orientated cars is suspension,the mistake everyone makes is to throw more HP at the setup and then they wonder why they have gone slower,try visiting a specialist race car fabrication workshop for advice.your going backwards if you try to get power from a chassis that isnt setup to make use of it,the stock setup is already enough HP to find the limits of standard and lowered springs/coilover suspension so what happens when you throw even more HP at it.....your handling gets worse.
