I totally agree that it's all about technique. I have a full sew-in with no hair left out, and it doesn't look wiggy looking. You might want to try that before getting a lace frontal/closure. Depending on the placement of the closure, sometimes it ends of looking really fake. Also, it needs to blend effortlessly with the weave, and should be the same color as your scalp. That helps it look more realistic.
These are some pics of my full weave with no hair left out. I was worried that it'd look wiggy, but it really doesn't. I plan to keep getting full sew-ins with no hair left out until I get to WL. I'm transitioning, and this is a good way to go if you don't want to have to keep using heat to blend your hair with the weave.