I'd get some 5'8" 25g like the game suggested. get some 18g to draw up with and switch when you inject.
The reason I wouldn't use the 1" is if you plan on leaving a quarter inch or so exposed, then who's to say you don't move the needle while injecting and hit a vein? 5/8" stick it in all the way, aspirate, and then you're good to go.