'Hybrids' are a straight bar road bike it's a market segment all brands want a slice of..
I say if all you worry about is loss of speed , try Motorpacing..
hire a training partner on a Motor bike * ..to go directly in front of you, you follow closely behind
the biggest problem with speed is the air resistance, having the pacer in front of you pushing that out of the way
lets you go fast with less resistance..
* add a roller bumper on the back of the pacers bike, so it spins if your front tire bumps it
and then less chance of crashing..
..