I've tested a bunch of the above strings in search for a comfy poly - all are really nice strings:
- Isospeed Cream is probably the most comfortable one, but doesn't hold tension really well
- Kirschbaum Proline Evolution is really comfortable, but I found it to have a kinda "meh"/dull felling: not crisp, not muted, hard to describe
- Tour Bite Soft is great, reminds me a bit of the regular Alu
- Poly Tour Pro is great - the 1.25 is comfortable already, but the 1.20 is a lot more. Also, I've found the yellow more comfortable than the graphite one (tried it as a suggestion from a forum member)
On top of that, I'd add:
- Weiss Cannon Silverstring - specially the 1.20. Holds tension decently, nice feel (a little bit on the softer side, not a lot of crispness/harshness) and really really comfortable. It's the string I've settled upon for the time being. Couldn't stand playing gut/poly or multi (including Velocity).
I would also test different gauges of the same string. Some thinner ones are harsher than the thicker ones (Hyper G comes to mind - I did not like 1.15 at all), but for some it's the opposite (e.g. Poly Tour Pro and Silverstring). My preferred gauge is 1.20 or so, FWIW...