I've been very happy with my LED setup supplemented with T5s. I think its the best of both worlds and in overall cost, much cheaper to maintain. If you run two 8-bulb T5 fixtures, you're looking at around $320+ bulb replacement costs annually! That's insane to me! That buys me two of my Ocean Revive fixtures which I could theoretically run for 5-6 years without any annual bulb replacement costs and they use less electricity.
I say do that and then use the money saved to buy a bigger skimmer immediately. With your fish population, I think that's going to be one of your most important purchases on the new tank... Unless you want another war with dinos, cyano, or pest algaes.
For extra pumps, you could always add a couple of cheap jaebos to supplement flow if needed.
You can obviously see a theme with me here... I'm cheap. I'd also just build my own sump with an old glass tank and add my own baffles.