I've had pro-stars on my car since 1997 and never had the lugnuts loosen up. I torque them according to the spec sheet from weld which is 85 ft.lbs.
I've had to replace 3 of the original wheels but only one of the wheels cracked on me but that was from a pot hole i didn't see and ran into,one from a tire going flat and warped the wheel i didn't even know it until i looked out the side mirror and saw a bunch of smoke coming from the rear of the car, the whole center of the tire was gone but the side walls were still there,the last one from my car being stolen and wrecked on the front drivers side bending that one.
The weld pro-stars are imo one of the best looking / manufactured wheels made and are a great weight saving wheel for the street.
I've had to replace 3 of the original wheels but only one of the wheels cracked on me but that was from a pot hole i didn't see and ran into,one from a tire going flat and warped the wheel i didn't even know it until i looked out the side mirror and saw a bunch of smoke coming from the rear of the car, the whole center of the tire was gone but the side walls were still there,the last one from my car being stolen and wrecked on the front drivers side bending that one.
The weld pro-stars are imo one of the best looking / manufactured wheels made and are a great weight saving wheel for the street.
I prefer 28" tall tires all the way around and in some cases even a 29" front tire. Gives you more roll out anyway. 
I also don't recommend daily driving on 15x3.5 Pro Stars. Speed bumps, pot holes and road debris will crack them if hit at speed. Even Weld says they are not recommended for highway use. If you want the skinny look up front on a daily driver, then a 15x5 or 15x6 (3.5" back spacing of course) with a 205/70/15 tire looks good, and you still have plenty of contact patch for emergency stops. 
