can't comment on the other exhaust but listen to this..

http://www.youtube.com/watch?v=Ft7ND7WKVpI

EDIT : it's a good idea i add what exhaust eh? HKS HI POWER DUAL

 

I just got the ETS V2 put on our MR...this thing is A LOT louder than stock...Im running it with stock downpipe and cat, and it's still LOUD. Once you get to cruising speed, it's ok. I get the drone at about 2500-3300rpm but it's not crazy. When you step on it and open up to WOT, it's like a NASCAR. Putting around town, you just need to be in a higher gear than usual instead of holding it in gear coz it will get loud. It's been cold here in NJ, so when you first start it up, it's really noisy as the engine idles and settles down. It was definitely a lot louder than I expected. It's funny coz everyone I was talking to said not to buy the Hi Power because it was too loud, but I think the ETS is my definition of loud. If you're looking to go low profile around town, this is NOT the exhaust you want. Thank you to ETS though coz all the parts and hardware were of really good quality, and the techs who put the exhaust on were impressed with how much lighter it was than stock and how nice the welds were.