The prob with Mt. Ranier is on the software side, better saying on the O/S side as gentle Mr. Gates promised to provide XP native support in order to write with no need of packet writing software and…
However, you can’t say this doesn’t exist but to profit of it you have to go to Linux and you may find a kernel after 2.4.19 that offers you the goods.
If you allow me a piece of advice, go to DVD-RAM if you want a reliable drag&drop media and use your RWs as “normal” discs you can re-use. This could allow you to drop the packet writing software and all the compatibility problems with other applications.
Buffer size is important but not as much as it used to be due to today’s buffer underrun protection facilities, but if you can take a drive with 8MB do it, everything else being the same.
Considering all your requirements, it seems you want it all and will not be easy to find the optimal solution, as:
- some good CD burners don’t burn DVDs;
- some good drives will excel burning CDs but being not so good with DVDs and vice-versa;
- the same for the DVD / DVD DL couple, plus the +(plus) versus - (minus) if you require it to burn both formats;
- and at the end, asking a very good “reader” to be a very good “burner” can be too much.
On the top of it, you have the issue: is it fast enough?
So, here you can get opinions based on personal experience (and you have sound experience around here) but you will have to make some concessions and at the end the decision has to be yours.