I think its funny when people claim to have 300hp to the wheel when its only for 2,000 rpms and thats what they call hp.
Provided your manual with a 5 speed and the looks of your dyno graph, you would be shifting below your perfomance band into the next gear.
If you use a 2.5 inch exhaust and a smaller turbo. With a good tune you can spool around 3k, that would give you a better all around performance band that you can appreciate.