Took a trip to Western Nebraska/Black Hills/Devil's Tower. Found out the car goes faster than my courage to push it. 135-140 was as fast as I could get it without freaking out. Great car for road trips!!!
Finally got around to taking a picture, have had them on about a month now. I'm very happy with the look.
SVE Series 3 Wheels - Continental Extreme Contact DWS06's - 285/35/19 back, 255/40/19 on the front.
I really do not have a whole lot to compare to in real life, but in my opinion the Roush AB with resonator still in would be a 3.
Remove the resonator and add an x pipe and you are getting into the 4+ category. Although this is based on those highly variable videos you mentioned :)
In the...
I also have a daily driver, I went with Roush and am VERY happy with it. Loud when you hit the throttle but pretty quiet at cruising speeds. Noticeably deeper rumble than stock at idle. That being said I don't think Steeda offered an axleback when I bought my Roush. They do make good products...