Personally I wouldn't bother with either a VTA or a turbo timer.
The recirc DV is perfectly capable, and IMO all a VTA will do is -
Make a silly noise
Maybe cause idle issues
Might cause car to run rich
Could cause bore wash
Increase fuel consumption
Not give any performance gains
Make a really silly noise.
As for turbo timers, just drive off boost for the last few miles home and it's job done!
All IMHO of course, someone will be along shortly to tell you their car runs perfectly with an aftermarket DV..........
Wes