I've heard the 991A called Shack in a Box. It both transmits and receives on all frequencies, including VHF/UHF. It has lovely digital signal processing, automatic antenna tuning, a full color waterfall display, and a 3 year warranty. The 710 does all of that except the VHF/UHF frequencies and the warranty, and it's $300 cheaper. I have an HT for those frequencies but it wouldn't hurt to have them on the HF rig.
The antenna is the biggest issue. Finding a multi-band HF rig is easy. Antennas seem a bit more limited that way. I really don't need a 200' tower in my back yard, for lots of reasons. Some have suggested stringing some wire across my attic with a small protrusion on the roof. Incognito is good. We'll see.
Get as much radio as you can afford. Buy your second radio first. It will save you money in the long run.
We have an Icom 7300 with an Alinco DM-330MVT power supply.
That radio is attached to an end fed half wave 80-10M 800W wire antenna. The radio end of the antenna is attached to a balun, which is mounted to an antenna mast on the roof peak of our single story house. The mast is attached to the house via a gable mast mount. The 130' wire antenna is attached to paracord via an insulator and the paracord is wrapped around a tree branch, close to the tree trunk. The tree is about 150' away from the antenna mast. Hubs got the terminal end of the antenna/paracord over the tree branch with a fishing pole and a fishing weight. GREAT CAST, LOL.
The antenna is a solid 20' to 30' high. The paracord is black and transits into the tree. The antenna wire is black, thin and equally high. Both are barely visible while standing in our yard. I doubt it most of our neighbors have even noticed them. The mast on our roof peak is simple and unobtrusive. It's been there forever; we used to have an OTA TV antenna on it which we've since removed.
We've also acquired a portable Yeasu FTM-3100R 2M radio for local communications and Nets. If a storm/ tornado takes out our cell service and we need to call for help, we need to call locally. The Yeasu has an identical Alinco DM-330MVT power supply. The last piece of our current desk set up, pending, is installing its Comet GP-6 antenna on the roof peak mast.
We have two Baofeng uv-5R 8W HTs with rubber duck antennas, plus we acquired Abbree 18" antennas for them. The HTs do not have great range as is, and we are in a bit of a hole out here. I have extended their range by replacing the Abbree whip antennas with a magnetic mount car antenna and plopping the car antenna on a metal surface. A piece of sheet metal on our wrought iron deck table worked OK; plopping the car antenna on top of our metal carport, which is anchored into the earth, works excellently. It is pretty amazing.
Our Baofeng UV-5Rs were marketed as VHF/UHF. The technical specifications say they can, the limitations of the radio determine if they will. The standard rubber duck antennas have the reception range of an average big box store walkie talkie or family channel radio. The Abbree antennas help a little. A magnetic mount car antenna on a grounded metal carport helps immensely. The entire carport becomes an antenna. We can reliably pick up a local repeater 20 miles away. This allows us to communicate locally and to participate in the local net.
After that, the major factor in pushing your signal outbound is the power of your radio. A standard 5W Baofeng HT isn't going to push your signal very far. An 8W Baofeng HT will push your signal a little further. By comparison, we expect/hope that our 65W Yeasu with a grounded antenna will receive from longer distances and push our signal out further.
HTs biggest advantage is easy, compact portability.
Different radios for different needs, different purposes. Determine what you need and buy the most radio you can afford for that purpose.
ETA: ALL THE THINGS NEED TO BE GROUNDED, radios, antennas etc.