It's really a matter of preference, but most Pro's choose not to use a drop forward in our modern era because of the ergonomics. The markers are smaller and shorter than they used to be, and we don't generally use huge Co2 tanks with propane tank sized valves attached to them anymore, so a marker with a drop forward is unbalanced and awkward. For example, my friend recently bought an angel speed and was all excited because it came with a large CP drop. I have an A4 (similar markers), with no drop, so I challenged him to a side by side test to see which left you in a more natural shooting position without strain on the wrist, and he had to admit he liked it better with no drop. If you use a 114ci 5000 psi tank, then I could see some legitimacy in using a short drop, but in general, they just make your marker's profile taller, force you to hold your arm in a "Z" shape in order to shoot, resulting in less control over your marker, especially while moving, and increased strain on your wrist, force you to hold your marker closer to your face, obscuring your vision, and things of that sort. If you see any pro's using drops, they are mini drops (for instance,
like this ) that serve no real "drop forward" function, but rather serve just as a fancy ASA mount. But, whatever floats your boat, it's all about what makes your marker comfortable for you to shoot, but if you try it with and without the drop, I think you'll find you have a tighter profile and more comfortable shooting position without one.