Hi Doug,
As you can tell from the responses, you have a lot of options here. If it were my tank I would probably go with a Remora skimmer over the BakPak and use a canister filter such as an Ehiem to provide for biological, mechanical, and chemical filtration. I have not used the BakPak with the shredded plastic but have read that it is not very efficient as a biological filter and tends to accumulate detritus over time. This of course would be the most expensive way to go.
My second option would be to just go with a remora pro, powerheads, and plenty of liverock. I would ditch the limestone and go with something like fiji rock. Although the limestone may eventually look like LR it will not provide the type of biological activity you get from real liverock because it is not very porous (I'm assuming this is Texas Holy Rock). I have about 175 lbs of fiji rock in my 140 gal along with a wetdry filter, skimmer, and shallow sand bed and my nitrates stay well below 5 ppm even though I only do small water changes every 2 -3 months.
My third option would be to just keep Emperor add a powerhead or two and just keep up with frequent small water changes and possibly use chemical filtration (poly filter, nitrate/phosphate remover etc.) as needed.

All of these options will work just a matter of your preference. Although I would recommend you use alot of liverock regardless of your choice in filtration.

Richard

Oh yeah, yet another option might be a Skilter filter which is a power filter and protein skimmer all in one. I have never used these so really couldn't say how well they work. Maybe someone else has had some experience with them