I see some products at bestbuy like cobras and stuff... are these any worth of buying? I mean can i get away with speeding if I have those ? any brand or model in particular?

Any device with bluetooth capability can be used to combat cops/cameras such as escort live. I have the escort passport 8500 x50 and its saved my butt a few times already.

thanks bro I'll check on the ones with bluetooth

are these illegal in the States? they were outlawed in Aus many years ago

Illegal only in certain states such as Virginia.

I've got a V1 mounted under my mirror with a Blend-mount.

Just so you're clear, a radar detector will only detect radar & let you know. It is not a radar/laser scrambler, which sends a false speed back at whatever is shooting it at you. Also, radar detector & scrambler laws are different from state to state so it's best to check into that yourself.

The Valentine radar detector

Passport 9500ix was top rated windshield mounted radar detector for a few years, I bought one about 4 years ago and LOVE it. It has saved me countless times. With that said, driving responsibly is your best chance of not getting a ticket

valentine one is awesome, and has a very nice app to use with phone/tablet in car. Id also suggest getting a dash cam.