If you check the Pioneer 110 review on this site (click on REVIEWS in the very top line of the page), it states:
The Pioneer DVR-110 can write CD-R with exceptional quality and ranks the Pioneer DVR-110 among the very best for CD-R writing.
. On the 110D review, they stated:
The DVR-110D can also write CD-R and CD-RW with very good quality, with some media (Taiyo Yuden and Verbatim) for example, the results are awesome.
While reviews only apply to the specific model reviewed, the 111 has supposedly only changed in using an updated chip set, so it would be reasonable to assume equivalent performance (although if you want to be sure, you would have to wait for a 111 review). The "D" connotes a USA model, which reads DVD-RAM, but does not write DVD-RAM (that feature being reserved for the "Asus" branded units sold them by Pioneer).
More critically, you should buy Taiyo Yuden brand CD-Rs, which are currently US$27 for 100, including shipping at www.newegg.com . These are universally considered the best quality CD-Rs by enthusiasts and professionals.
Some studies show that best results are obtained by burning at half the rated speed, and certainly no fasther than one step less than the rated speed (so 24x, 32x or 40x).
PS Other good qualities of the 110/110D are top performance on DL DVD media (both speed and quality) and fast speeds in DVD-Video ripping.