I don't puzzle as hard as anyone here, but I like to think the "micro fiber" type of pens are nice. Got a really cheap generic one from ebay that looks similar to the amazon's that was posted by someone in these threads.
If you want you can ebay one "micro fiber stylus" and search for lowest price buyout. It is like $1.30 - $1.50 free shipping from Hong Kong, but expect like a month's delivery time. Buying from a North American Vendor probably costs ~$2.80 but you can expect it within 1.5 weeks usually?
Just my personal input, I wanted to see if I would like a pen, and buying a cheap MicroFiber one off of ebay suited my needs. If you can wait the month then it is super cheap from HK, for a bit more then NA, if you want it right away then Amazon for a premium.
That being said, the draw backs of the cheapy ebay one is that the pen shaft is made of cheap plastic and light-medium weight. You might want to look up something if you want it heavier. Also no fancy cap, or replacable heads?
Don't know enough of the "su pen", the type of heads and whatnot to compare :3 but satisfied with my microfiber pens. Generic rubber ones is a big no no, however. That said, if you have access to an S Pen, which I think is only for android? It sounds nice :3