RDP - If you want to get high down- and upload speeds.
You have to do everything yourself. Downloading, uploading, RAR/UNRAR .... posting to forums/blogs, making thumbnails etc.
Rapidleech - You can queue a number of downloads/uploads, but you have to do the RAR/UNRAR manually. And of course posting to forums/blogs too. Making of thumbnails might be automatic with MTN on most providers.
sBorg - Everything is automated. Download, upload, RAR/UNRAR, thumbnails, posting on forums/blogs. However, no queuing is possible.
In my own opinion (not a big uploader), sBorg is great! But it misses the speeds of a RDP.