125-200cc WRE/SMS 125 exhaust advice?

Hi, I've just received the carburetor parts for full power jetting and just need to order an exhaust now. I really like the look and sound of the scalvini also I've heard it gives good gains across the rpm range, however it is one of the most expensive options. As I use my bike on road and for byway greenlaning I don't really want a peaky exhaust with only high up power. I also like the DEP but I've not heard so much about it's gains, yet it is much cheaper than the scalvini system. Also when riding on byways I don't want to be too loud so ideally I'd like a pipe which works with the stock can.
Cheers,
Ryan

I like my dep, seems to be fine on low down and high up power, motocross direct sold me the full system, it's not ridiculously loud either like some of the 50cc scoots you see buzzing about, go for the full system what size jets did you get sent?

Thanks, I've been looking at a full dep system from dirtbikebitz for £260 posted. I'll have to check all the jets when I get home, but from memory there's a 165 main jet

Just checked the sizes and they are:
Main jet 165
Idle jet emulsifier U34
HN270 Fuel nozzle
Throttle slide 50
D50 Needle