The Precision Marine HOT-1 is cheaper, yet built much better and works much better than the Remora Pro. Much more contact time, higher GPH throughput, loaded with features, and built like an army tank.
I think I've discussed this with bigtank before, but I disagree with him here. I have, use and like both the Remora Pro and the HOT-1 -- but I like the Remora Pro more. Construction is definitely better on the PM model, but the R Pro is easier to clean (a wire pipecleaner suffices for the injector assembly, and a collection cup that you don't need to remove thumbscrews to empty) and is a bit of a better performer. If you step up to a mag drive instead of the Rio 1400, it's performance significantly increases as well. Having talked to Mike at PM in some detail about the HOT-1, you just can't throw a larger pump on it to 'overdrive' it's performance.
Anyways, I like both, I use both, I recommend both, and either will definitely outperform a bakpak.
While I love the lifereef model, I'll echo that it would be incredible overkill on a 30g. Also it's in tank pump assembly would eat up a disproportionately large amount of space in a tank that size. If you think you're going to get a bigger tank and still not use a sump, then the lifereef might not be a bad idea at all. If, OTOH, you're not planning to go larger then I wouldn't go for the lifereef.