Need some advice, thanks

[Shipwreck]

I would not use the fluidized bed and if you use the fluval keep it free of media and use it just for flow. A sump/fuge would be a better solution for both of these. As well make sure you have a good skimmer, a sump gives you the option of buying an in sump version and more choices.

For lighting I would go with T5's and not VHO. VHO is being phased out and will no longer be available in the near future. T5's are cheaper, more common and provide a better light output at less power (hence the reason they are going to be no longer produced).

As for your fish list your tank is no where near big enough to support any member of the tang family. The other fish on your list sound like a good choice for a 45.

An octopus tank sounds neat but do lots of reading before you jump into that world, their tank requirements and care is much different then regular stuff.

Good luck on your setup and feel free to ask lots of questions.