Hi and
Good luck with the homecheck. You must be very excited
You'll get almost as many different answers about food as there are posters on here but I'll give you my opinion. The most important thing to begin with will be to feed them what they are used to and transition over to what you want to feed gradually.
Wet v dry. personally I'm a fan of wet food as cats need water but aren't great drinkers so it seems daft to me to take the water out of food and then struggle to get them to drink water separately. They need to drink a lot of water to compensate for what is removed in dry food. As they get older, lots of cats develop kidney problems and water is even more important then so I think it's worth getting them to like wet food whilst they're young. It can be heard to get an elderly cat to change from dry to wet. It's also easier to add medication or food supplements to wet food. So I feed all wet food to my 13 year old cat and a mix of wet and dry to my 4 year old (he gets half wet and half dry at most meals with a few all wet meals thrown in so probably over half his diet is wet).
I used to have lots of links re why wet food is best for cats but I'm at work now and have no intenet access at home at the moment anyway. Gillian (ambercat) did post a few on a recent thread about food so if you search you may find them. I think
www.catinfo.org was one. Google Lisa Peterson (?) will also bring up some info.
The advantages of dry food are mainly convenience as it can be left down or put in auto feeders easily. It's also more cost effective. Some cats will refuse to eat wet food and will insist on dry and in that situation there's not much you can do except feed a good quality dry food.
As to brands
I had a look into the meat content of various brands and some only had 4% meat content?!
Surely that cant be right?? 
Yes and no. It's 4% of the named meat so there will be more meat in there, but how much they are not obliged to say. Legally there doesn't have to be more than 4% so if there are cereals in the food, the meat content may well be quite low.
If you choose to feed some dry, I feed Encore (from Sainsburys), Applaws and Orijen as they are dry foods that are grain free and contain approx 80% meat. They are probably what are called super premium foods and are as near to a "natural" diet as you can get in a dry food. Next best would be a premium brand such as James Wellbeloved who do a good quality hypo allergenic dry food (available from pet stores) and Pets at home premium (in the silver bag). I'm sure other dry food feeders will have some more suggestions. I'm not that familiar with dry foods as I don't feed much. If you are going to feed a dry food, make sure it's good quality and avoid supermarket brands such as Go Cat and Whiskas if possible. If that's what they are used to and all they will eat or if they have digestive problems on other stuff, fair enough - but I think it's worth trying to get them to eat something better quality.
For wet food - try to avoid foods with cereals. I feed bozita, natures menu, hi life, pets at home purely, schumsy and lots more. Mostly foods with no or few cereals. I find it fine to mix lots of brands with no upset tummies. Jaffa does have some felix senior because he loves it so I let him have that some of the time even though it's not the best food out there. Zooplus sells a lot of brands of wet food if you're interested in ordering online (there is a link at the bottom of the Purrs home page - Purrs gets 5% commission if you order via the link).
You can go for raw feeding if you're interested in that but research is vital to get it right - we have a few raw feeders on here who will be able to advise if you ultimately want to go down that route.
