I have the Trident (Wolf) half system with larger carbon cans and midpipe - I like it. It replaced the TORS I had on my bike at first. They are considerably louder and deeper, but not too much IMHO.
Both Arrow and Trident offer slip-on silencers or half systems. I am not sure about Jardine, they may only offer slip-ons. Chain Reaction only offers a half system with black silencers, but no carbon option.
The biggest issue with exhaust restriction is the precatalyst/sound baffle in the header. Until this is removed, most exhaust systems will make the same power. If you plan on removing this later, buying a half system now will be the best option for performance and overall costs.
The stock bikes make around 112-113 hp on a Dynojet at the rear wheels. With aftermarket silencers, expect 117-118 hp from all systems. Tuning (Tuneboy or PCIII) can improve the midrange and top end to as much as 124+ hp at peak. With header work and some intake clean up, you will definitely need tuning, and can make a good bit more power.
Carbon silencers tend to absorb the higher pitched sounds, and can result in a deeper tone. Larger diameter tubing through the silencer(s) tend to be louder. Longer silencers tend to absorb sound better than shorter ones. larger diameter silencers can add a deeper sound in sound engines and slightly quiet the sound. Low mount silencers (with little or no mid pipe) will tend to allow a bit more distinction between the exhaust pulses - think harsher tone due to being closer to the engine.
This might raise more questions than it answers, but I hope it helps.