Originally Posted by
no1mad
You don't need a 2nd rail, but it sure makes things easier.
^^^^ This ^^^^
I got by with an ordinary rack for 18 months or so. There was a lot of cussin' and fussin' every time I wanted to use both the panniers and the trunk bag, but I could make it work,and lived with it for a long time.
The dual siderails rack I have now I just such a pleasure use that I don't care that it cost a lot more money, and I don't care that Topeak came out with a much, much, cheaper dual siderails rack shortly after I purchased mine.
Since you're already looking at a Supertourist, just go with the Supertourist DX and be done with it.