I'd also consider getting the longer "long ski-style" bar ends. (These point foward roughly half their length, then make a 90 degree bend toward the centerline of the bike (the stem) and rise a little bit upward.
While this type of bar end might present a hazard off-road, for pavement bike use they provide at least one extra hand position which shorter bar ends do not.

To make your grip on the bar end more comfortable and secure, try wrapping them in handlebar tape!
(It also looks good!! )

I've done this on my flat-bar pavement-oriented bikes. Just remember when you are in heavy traffic, for your safety get off the bar ends! (Hint for bar end users: You needn't let go of the bar, just release the bar end and rotate your hand(s) inward, pivoting on the palm(s). Your hand(s) will fall naturally onto the controls.)