Hey Franco, you're really not lookin' for input or opinions are ya'? So far, you've summarily dismissed everyone one who hasn't whole-heartedly endorsed the sheer brilliance of your plan.
The Taurus 605 is a fine piece of high-quality equipment.
We all think that increasing the timid muzzle flash of an EDC .357 snubbie is wise.
And, most of all, we mouse-hearted, weak-kneed know-nothings are sooo glad to help.
I've enjoyed Magna-Port services on several firearms. IMHO, they're top notch. You might also consider Gemini Customs (yet I'm unsure if they're smart and/or strong enough to work...on your Taurus)