Actually, with a neutral nature, the only things it outspeeds are Suicune and Toxicroak, neither of which are very common in OU. Even with Sticky Web up, 207 Speed fails to outspeed Jolly M-Garchomp and does not reach a benchmark for anything else that's relevant. 44 Spe is just not worth it imo.
I actually think that the defensive set is better with no speed investment. Uninvested Skarmory, Magnezone, and Aegislash are all naturally outsped with no investment and are 2HKO'd with Fire Blast. Scizor and Metagross, however, have SE priority, and Careful Tyranitar usually runs Assault Vest, which makes Aura Sphere barely a 2HKO. Those are better taken care of by team-mates. You can't really get past Rotom-W without getting at least one +2.
The bulky-attacking Modest set might benefit from 176 or 196 Speed EVs. The first of these outruns Adamant Breloom which, though it has received a large number of nerfs, is still relevant in OU. 196 Spe outruns Jolly T-Tar. If those aren't a concern but more power is desired, 52 Spe outruns neutral 0 Spe Rotom-W. Both T-Tar and Rotom-W are 2HKO'd by LO Dazzling Gleam after Stealth Rock.
Incidentally, maximised speed allows Togekiss to outrun neutral M-Garchomp, one of the few dragons that Togekiss can actually outspeed. Garchomp tends to be Jolly however.