No... I don't think the OP made a bad choice. Not at all. I liked my V1S for sure. No doubt, there's been a lot of KB users that have excessive discharge temps. I've been part of some of those discussion/trouble shooting sessions. A lot of times, the source of those temps wasn't the blower itself. It cam down to 1 or more 3 things.... Blower to small for application (overspin), inlet restrictions, or poor tuning/combo slection (back pressure has a hand in this too).
Don't get me wrong. I would LOVE to have an air to air cooler for my Kenne Bell. Hell, I'd even take an air to water! One of the reasons that I bought the kit that I bought was because Bob Kennedy had the intention of producing a street intercooler kit. The only part that I really wanted to address was what I percieve to be a gross generalization of screw type blowers making excessive heat. I have found the reverse to be true in a repeated number of circumstances. I attribute a lot of that to the size of the cases and RPM that each uses to produce boost. Now the exhaust end of the screws do get pretty warm. Still.... that heat is dissipated over the length of the screws and so long as air continues to move, that portion is mitigated. It's when you shut it all down that you can really see that difference.
To the OP:
Like anything else with modding, it's all about your supporting pieces and parts. Any boosted can be done wrong and each has a different requirement to run well. I've been working on my setup and making changes for years and there's STILL more left to do. Installation of the kit is only the beginning. It doesn't matter if you run turbos, or a centri, or a screw blower... The tweaks you make to support the kit are what the difference between a kit that makes eyes go wide when they ride in it and the, "Meh" response you get from so many others.
Please resume your normally scheduled.... er.... schedule.