if you want a great tune, do both.
Or you can put whatever numbers you want to in your VE table and then realize that its not effecting your tune. If we were talking about a Cobalt PCM... then ya, you have to do a VE tune. Our PCMs seem to be archaic and only use the VE table when the MAF doesnt work.

I just tuned a 344whp 377wtq non intercooled S1X car... with a stock VE table.
I just tuned a 373whp 398wtq intercooled XP car... with a stock VE table.
I also run a stock VE table on my car.