Waterford in the drops, ride it and don't look back, don't spend money. Tests are finding that discomfort level affects performance at sub-pro levels. The Waterford may be the most comfortable, so you can go harder on it with less pain penalty.
Fit right and train in the drops hard, and when you TT, start in 'em, stay in 'em, learn to shift without moving much. If you like the drops, get bar ends, avoid the shifting penalty.
If you do well, you can switch to aero's, still use the same bar ends on those. Minimum investment that can carry on. But I'd TT at first in the drops.
October '89 Bicycle Guide has a great, common-sense experiment showing the real benefits of aero's, drops, shifting.