While I did enjoy stage 2, saving for a bit and doing a VF48 swap the right way was worth every penny IMO. I think the end cost for me was about $1,600 for all parts, labor, and tune (you could definitely do it cheaper). I'd do it again in a heart beat.
Parts included in my upgrade...
Perrin turbo inlet
Grimmspeed 3 port EBCS
Walbro 255 fuel pump
Dyno tune w/ Accessport
Previously installed parts...
COBB 3" TBE
The VF series turbos are perfect for a DD, IMO. They will hit 300whp safely and reliably and the spool is fairly quick as well. So I vote for this route.