Many of our favorite drives from 2008 are no longer easily found. If you can locate one, the Sony Optiarc 7200A would be a good choice. I found one through Amazon.com just now.
The Pioneer 116 might be an alternative. Both of those drives are the older IDE interface like your current Sony drive.
Blu ray burners are still very expensive as a general purpose drive. Only buy one if you are certain you want to work with blu ray media...and all the BD-R and BD-RE media is very expensive as well. I have an LG GGW-H20L that has been good so far. All of the internal Blu Ray burners I've seen are SATA interface, so you'd have to have SATA ports available. There is one LG external Blu Ray drive that connects via USB.
Edit: And Arachne makes a good point. If you have experienced some failed burns, the drive may have slipped into PIO mode. The important part to look for in DMA is your Current Transfer Status. It should be Ultra DMA 2 or 4 (don't know which for that drive).