bit late but i have the devilbiss gti (superceeded by the gti pro which is better again) and while its good and it was great when it was released theres better guns out there now.
the iwata w700 supernova? is a top gun, sprays better than anything ive ever used and its about $760+ from preston motors.
puts on base and clear coats better than you could ever imagine, i fell in love in about 3 strokes
for someone like yourself id recommend the iwata w400 for about half that price, it puts on metallics better than my gti but i cant clear and top coat with the stupid thing...