These days DVD write speeds stack up like this:
DVD+R Speed: 24X
DVD+R Dual-Layer Speed: 16X
DVD+RW Speed: 8X
DVD-R Speed: 24X
DVD-R Dual-Layer Speed: 12X
DVD-RW Speed: 6X
DVD-RAM Speed:12X
A cheap non-Bluray drive that hits these speeds goes for $20 on Newegg:
http://www.newegg.com/Product/Product.aspx?Item=N82E16827135204
The problem with Bluray drives is that their DVD write speeds are typically slower than a DVD/CD burner, so bear that in mind. With that said, the most readily available BD drive with the fastest DVD writes is this one for around $55:
https://www.amazon.com/Asus-DVD-ROM-Internal-Blu-Ray-BC-12B1ST/dp/B004SUO068
Here are the speeds:
DVD+R Speed: 16X
DVD+R Dual-Layer Speed: 8X
DVD+RW Speed: 8X
DVD-R Speed: 16X
DVD-R Dual-Layer Speed: 8X
DVD-RW Speed: 6X
DVD-RAM Speed: 12X