I am also just getting started, and went from a regular Rubiks to a Dayan GuHong with 48 point edge mod. Believe me, once you try a Dayan or an Alpha, you will probably find yourself saying 'wow...' only after a few seconds of turning. It is really dramatically different. Yesterday, I got a LingYun V.2, and in terms of speed, it is very, very fast. For me, I think it feels about 50% faster than my GuHong, and the torpedoes work well with my style.
I think anything you choose will give you a remarkably different feel from the original Rubiks, and if you can solve the original cube quickly, I think you have the potential to shave off a lot more time with a proper speed cube