Cheers for all the posts guys, I think I have settled on AI Prime HD - I like the fact it's small but powerful, plus its specs will fit my 30 gallon nano spot on. I saw a good Australian review on youtube with a chap that has my tank. Deciding factor is the size for me as currently I have the aqua one mariglo which spans the entire width of the tank making cleaning awkward.
Just need to wait until the weekend to get to the LFS, by which point they will probably be sold out. I have not really ordered anything online yet so unaware of reputable companies out there, guy at the LFS said a lot of marine sites are just people selling stuff out their garage so I have been hesitant