Hi Webos and welcome to Reef Frontiers! I see you've been a member for a lil' over a year, but just recently started posting. Glad to see that!
On to your lighting...
From your link, and clicking on the Images tab, it does appear that the fixture you're looking at does have ICR (Individually Contoured Reflectors), which is good! The key to T5HO success is all about the reflector. Stay away from fixtures that have a flat, parabolic reflector.
I'd imagine it probably comes with low quality bulbs, so you'll want to replace the bulbs, with some quality bulbs, OR go with a different fixture. Here's a couple of recommendations.
Sunlight Supply Tek5 4X24 watt T5HO fixture. Should run you under $300, with quality bulbs.
Sunlight Supply Tek5 Elite DOH, they aren't available in 24" so never mind.
Both of our great LFS, over here in Spokane, are Sunlight Supply distributors, as well as Sponsors, here on RF, so could get that fixture in for you. I believe a couple of the Sponsor LFS, over in the Seattle area are also Sunlight Supply distributors.
Sunlight Supply Tek5s are a proven, quality fixture, with very good Advanced Electronic Ballasts. I'm not familiar with AquaticLife fixtures and while the link you provided does show pictures of the reflector, there's no mention of what type of ballast they use.
However, provided they use a decent ballast, this fixture should be plenty, for a BTA, along with most other corals you'd want to grow. Placement of some SPS would need to be near the top though.
As for your particular anemone of choice, a BTA. They aren't quite as light demanding as some of the other anemones AND they're naturally a rock dwelling creature. This will help, in that living in the rocks, it'll be closer to the light, than an anemone that naturally lives in the sand bed.
Please keep in mind that Entacmaea sp. of anemone are notorious for roaming around tanks. They wander a lot. In their wanderings, they put other livestock at risk, as they sting anything in their paths.
On to your filtration.
As was mentioned, quality live rock, combined with quality flow, with the possible inclusion of a protein skimmer, is all the filtration you need, for a successful reef tank.
The addition of a refugium will also help, tremendously. Instead of a HOB Power Filter, I'd suggest looking into a HOB refugium, such as the CPR Aquafuges, with a deep sand bed. The small or medium size would work out great for you.