A budget of 5k, holy hussnads. And you're not doing a marine tank??? Especially if you're lookin to get that bowed acrylic tank. Yes thats a beautiful tank, its like 2k or so I think. But ya, acrylic will scratch way easier than tempered glass. Glass is much easier to care for and to clean, because you dont have to worry about what you are using for tools to scrap off algae etc. I have a 72 gallon bowfront All-Glass, and I love it. Anything bigger than that and you're really moving into "too much time spent on it" territory. Freshwater tanks might be a bit easier to care for, but not as much as people may anticipate or be told, especially if you have lots of Live Rock in a marine aquarium. Once your Live Rock is fully cured and sprouting with all sorts of marine life and organisms, it pretty much makes the tank self-reliant except for the usual water change every few weeks. A marine tank with plenty of LIve Rock will eventually become stable and "heal" itself, it keeps itself balanced very well, as opposed to tanks without Live Rock. I am at the point now where I only do water changes ever 3 or 4 weeks, like 20-25 gallons. And I've had some of my fish, like my Puffer, for almost 2 years. Yeah, mixing the salt over night and then siphoning the water out and putting in the new water can take an hour or so, but what the hell, it's way worth it. And the type of stuff you can get now really makes it easier to care for, for instance I dont even use buckets to remove water while doing a water change anymore, I use a Python hose and out the window the water drains. No spills, no mess. To be honest, I wouldnt by that beautiful bowfront tank and just put freshwater fish in it. NO offense to the freshwater hobby out there, but that would be like buying a Ferrari and putting milk crates in it for seats. Such a nice tank should have marine life in it. With 5k to spare, you have more than enough for the essentials....
The tank/stand etc.
A good light setup (I have an Orbit compact flourescent 48", 4X65W setup, 2 Actinic PC's and 2 10k Daylight PC's, plus 4 moonlights for night time, looks incredible!)
A Penguin or Emperor Bio-Wheel filter
A Protein Skimmer
Between 100 and 150 pounds of Live Rock
A few Maxi-Jet 1200 powerheads (for water movement)
Then ofcourse the salt, a hydrometer, and a marine test kit. Then you're pretty much on your way. Its a great hobby. And the type of marine animals you can get just far exceeds that of freshwater, especially if you like a broad spectrum of color. but if you really want to do freshwater, get some game fish lol, like some LArgemouth Bass or Striped Bass fingerlings, and raise them. But if you need specifics, let me know and I will give you all the links to everything you need, right from the places where I get my own stuff :)
Marine is the way to go!!!!
This is KooKoo Kat sittin on top of the chair watchin' the tank lol...