1. the housing is different ( you want an E housing )
2. Handatas not bad if you can get a good workgin unit from them. I was a dealer for 2 weeks till 3 of my first 3 units were bad. I like my AEM EMS
3. They are all going to work at 10 psi you have listed as maximum. Id go with a 35mm Tial if you must have a brand name
4. Steel (tubular) you can make more creative designs to increase power but with cast you stay cost effecient. A good tubular manifold can run you 600+
5. If you do EMS you can use that or jsut go with a Profec B. That is an electric controller not a mbc as mentioned above
6. PWR all the way, cheap and the best on the market
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