I like the Lite-On DH-20A4P. Currently $24 shipped from newegg. Good scanner, excellent Verbatim DL burn quality, and a decent CD burner IF you use quality media such as Taiyo Yuden.
DVD+R and DVD+R DL on the Lite-On is set to DVD+R and DVD+R DL booktype by default. You’ll want use the bitsetting utility for Lite-On drives or the “EEPROM” options in IMGburn to change this PERMANENTLY to DVD-ROM. There are other ways to enable bitsetting, but they only last until the next reboot. Bitsetting to DVD-ROM will give better compatibility with standalone players.
The Pioneer DVR-115D auto-bitsets DVD+R DL to DVD-ROM, meaning that you get the setting without any input from the user and there’s no way to change it. However, DVD+R (single layer) is auto-set to DVD+R booktype, and there’s no way to change to DVD-ROM without using third-party firmware (which voids the warranty of your burner).
If you don’t care about not being able to bitset DVD+R to DVD-ROM without voiding the warranty or just want to use DVD-R (for single layer), then the Pioneer DVR-115D is excellent for burning quality. I’ve had a couple of bad experiences with flashing to Buffalo firmware, which voids my warranty, then the drive dies a few months later. So I don’t play that game anymore.