Welcome, Kareem's.
In the US, the majority of models large enough for 6-8 people will require a 220v isolated circuit, so your first step will be calling an electrician
If you were looking at smaller "sport" style tubs, eg. 4-person, 300-gallon types, then its possible to get a model that runs on 110, but even though heat quicker erc. If you convert them to 220, and mfgs usually say they need their own circuit regardless.
With respect to brand names, many people say you simply "pay more" for lines like Hotsprings, but I don't know if that's true...I've had two models over my lifetime. The first was a VitaSpa, a company now owned I think by Maxx. I had minor issues with it as it aged. The longest-living has been a Jacuzzi, which is celebrating its 20th birthday this year

Its a small sport style and I had to replace a pressure switch once, and the 2 HP pump once (after 17 years of service

and most recently, a capacitor. Not bad for 20 years! )
I've been looking at new ones and also barely know where to start...at this point, I may just keep on with od trusty

But I did take a look at some smaller models of the Hotspings line, and liked the Prestige -- a four person model with a semi-open design.
But I'm looking for something that will fit a tight footprint (78-84") and don't want certain features that others might...eg. I don't want a "lounge" molded into it.
Hopefully, people who've purchased a hot tub in the last decade will chime in with suggestions for you. The only reason i was looking at the energy-effcient Hot Springs models was because my repair guy mentioned they were a brand he personally liked and bought. Figured he might have a clue...and hes not the type to recommend a brand for the extra work

Best wishes in your search.