Alright currently I have the following mods:

-Buschur Intake
-Buschur TBE 3"
-HKS 264/264 Cams
-XEDE w/ Stage 1+ Map

I was thinking of upgrading to the 20G turbo since I've been hearing such great things about this streetable turbo. What should I do in terms of tuning and supporting mods for the 20G turbo? Just ditch the XEDE for a flash?

 

Why would you need to ditch the Xede? You've already paid for it and you can tune it yourself or have it done by someone else. As for supporting mods, I believe David has said he'd recommend his stage 3 before a turbo upgrade. Short of IC pipes, it looks like you're there.