Hmm… as a rule, I think exotic powers require more attention from the audience, particularly if they have unusual parameters (like the ability to use telekinesis but only on paper or metal).
If a power requires a lot of audience attention and/or explanation, I think it’s important to make it front-and-center. For example, Spiderman’s webs are his most distinctive and most-used power (besides the more generic agility/strength), but Superman’s eye-beams and icy breath are just minor tricks that rarely see action.
Invisibility is a good power, and superspeed is ok (although superspeed will make it especially difficult to write in fights with unpowered criminals). However, I’m not sure about the combination. First, they don’t seem to go together very well. Second, I don’t think they’re very complementary. For example, Wolverine’s agility and claws are complementary because he can work in crazy acrobatics as he tries to claw someone. Likewise, Spiderman can do acrobatics or wall-crawl as he tries to shoot webs.
I think invisibility would work better for something like a stealth theme, or maybe an intangible ghost theme. Superspeed is more limited. Usually, the character is just a speedster (like the Flash or Quicksilver).