I want to do a dio with a AA vehicle in a urban setting. I've settled on using the Plusmodels German House, but i'm having trouble deciding which kits to use. My choices are:
Italeri Sdkfz 10/4 with Flak 30,
AFV Club SdKfz 251/17 Ausf C
Tamiya 8 Ton Semi-Track with Flak 37
Going to use the Tamiya German Flak crew set also. Any advice will be welcomed

Well, it's personal preference - which kit do YOU want to build? My personal assessment is that the Tamiya kit will give you the least problems in building up into a good looking model.

I agree with Toms; Go for the Tamiya kit! It will be better for you!

You can't go wrong with Tamiya. Good luck and I can't wait to see your dio.

Actually, you can go wrong with Tamiya. Their SdKfz. 7 kit is 35 years old, now, and the Flak 37 parts are only five years newer. The vinyl tracks are especially poor, with no detail whatsoever on the inner face, and they are the wrong width. The hubcaps for the wheels are also the vinyl keepers for the axles, so you have to trim them perfectly round rather than sanding the nub off from the sprue. You can correct both these problems with the Model Kasten track set (which includes replacement wheels as well as workable tracks) but it'll run you another 30 dollars USD.
In terms of accuracy, I'd go with the AFV Club kit.

The Tamiya kit is fine, just go with that.

Seems to me your question is a little vague... what is it you are trying to portray ?- what vehicle was present at the time/ place in question ?- is this for the defense of Berlin- late war ? What is your skill level? What is it you want to achieve? - I'm soory if this post is not helpful but the question is a little broad. I find that the best kit for one person may not be the best kit for another - I would gather all my research and then decide what I wanted to portray and then base my desicion on all the relevent factors.