I just had to replace my DVD/CDRW unit. I chose for the little difference in cost to go ahead and get a unit capable of writing DVD's as well. I must plead ignorance to all of the terminology though. Is there a good tutorial or summary anywhere in laymen's terms for the different applications relative to these units. (i.e. "+", "-", "double layer", etc. etc. I really don't know what media applies to what I might want to do.Thanks for the help:RTH

+ vs -There isn't too much functional difference between the two. Both are "supposed" to be fully compatable with set-top DVD players, and both are right around the same price. In essence, they were two competing formats "within" the format of DVD recordables. Most, if not all, DVD burners on the market support DVD-R and DVD+R. I would check the Internet to see what your set-top DVD player can handle, and buy that type of media when the time comes. (eg: I found my panasonic DVD player liked DVD-R's better than +R's, so if I am taking a home movie and burning it, I choose -R's)-RW vs +RWThe + RW system has some functional differences, allowing users to add files to a disc and have things seamlessly blend in. I've never used this, so I can't speak for it's actual worth. Single-Layer vs. Dual LayerAll DVD's produced today are either single layer (DVD5, 4.5 GB) or dual layer (DVD9, ~8 GB). Single layer discs have just that - a single layer of data on the disc. Dual layers get interesting. They have one layer of data which is translucent, and another layer behind it. The DVD player focuses it's laser on one layer, and then when needed, refocuses to the other layer. Most major movie releases are DUAL layer, so that the studio can fit a high-quality movie and some extras on one disc. When it relates to computers, single layer recorders were all that you could get up until the past few months. Dual layer recorders are now becoming popular, but the MEDIA costs for dual-layer blanks is very high. VERY high. Sure, it will come down, but right now it could be considered cost-prohibitive. SUMMARY:I'd shop for a burner that can do -R, +R, -RW, and +RW... There are a good number of burners which can do all four formats. Right now, I wouldn't concern myself too much with dual-layers, but if they are cheap enough, I'd do it. Having the capability for when media costs go down may be worth it (especially considering you double your storage capacity).Good luck!-Greg

Thanks for the info Greg:I believe I have the full package with what I purchased. I will experiment a bit.Thanks again:RTH