The Evil LPR only comes in black, and I'd rate it "ok" with the internals you have. Designed primarily to be used along with the Evil valve, it reduces the valve chamber volume somewhat, because it is supposed to be set up with a higher valve pressure. It is neat though, with no hosing to get shot
The ND LPR is a Jackhammer II nicely fitted to a front cap, and with a tourney-lockable knob. It is available in pretty much any colour you choose, and is excellent, especially when used with the RIP valve. It is a bit on the large side, though.
There are so few SP LPRs out there so far that not many people have been able to form an opinion of them. They're certainly small, but without reducing the valve chamber volume. Apparently Adrenalin started work on their own LPR to fit the AI, but in the end settled for the SP LPR instead, so it must be reasonably good at least.