I've got a 1983 Miyata 610 touring bike which I've been working on for a couple of months.

My next big upgrade I just invested in is a 700c wheelset, shimano ultegras laced to 36h open pros. I know, not really "proper" touring wheels, but I don't plan on doing fully-loaded touring and I weigh around 135lb.

With that said, I was wondering if anyone could recommend a Shimano cassette for the new wheels that will work well with my current Suntour derailleurs. I have the original suntour mountech in the front, with the original triple chainrings, and I've replaced the faulty mountech rear derailleur with a Cylone Mark II long cage.

I think the original suntour cassette is 5-speed (14-28).

I was thinking of going with an 8-speed to avoid shifting/alignment issues.

Any recommendations would be highly appreciated!

Thanks!