Welcome back to this fine hobby of ours
As I build pretty much exclusively in 1/72, I can make the following recommendations.
Typhoon- Look no further than Revell. Excellent detail, pretty good fit, loads of weapons and a beast of a decal sheet. All for a tenner, bargain. Haven't built a twin stick yet, but I imagine it's as good as the single seater.
Harrier GR.7/9- You have two options here- Hasegawa (sometimes in a Revell box) and Airfix. I personally prefer the Hase kits- engraved panel lines and better fit make for an easier build, but the Chaff/Flare dispensers and RWR/ECM fairings specific to RAF machines are not present in the kit. The Airfix kit has these, but the intakes are horrible and there are raised panel lines. I also prefer the Airfix nozzles to those in the Hase kit, but both leave you with nasty seams down the middle of the rear nozzles (really need someone to do some top quality aftermarket nozzles for all Harriers). The Airfix kit also gives the option of a positionable airbrake, which if you model your Harrier wheels down must also be drooped as it is mechanically linked. Finally, Hase being Hase, you get limited weapons.
Here's how the Hase Harrier scrubs up, though I did throw about as much aftermarket at it that I could get my hands on
F/A-18- As you can imagine, there are plenty of options here. For a Legacy Hornet, I'd recommend the Academy kit. Haven't built one yet, but it looks stunning on the sprues, with lovely detail and I'm sure good fit, typical of many of Academy's newer toolings. For the Super Bug, I'd suggest you go for Hasegawa again. Typical of Hase, lovely detail, except for the cockpit which is a bit sparse. I added an Eduard zoom set for mine, as well as drooping the flaps and adding some additional weapons and FOD covers, but it builds into a lovely model. You can find them quite cheap too if you know where to look
A-10- Been a while since I built one, so I'm not really sure what to recommend. I have an Academy kit in the stash, which looks OK, though the weapons look a bit suspect and inevitably the decals would be pants. might be worth looking around the Internet for more info.
There are a few other modern jet kits I can recommend. The Revell Tornado is a peach, one of the finest kits in 1/72. Revell regularly re-release this kit with updated markings for various German special schemes if that's your sort of thing, and the GR.1 version has all you'll need for an early RAF Tonka (the addition of an additional chin pod from an Airfix kit and some aftermarket declas present the option to build a GR.4 too). Similarly, the Revell F-16 is generally considered the best in scale, with loads of boxing sof European F-16AM models. If you're, you might also come across the F-16C boxing.
If you ever fancy doing some Cold War stuff, I'd thoroughly recommend the Revell Hunter and Academy Crusdaer. Both are superb kits. The same can be said for Fujimi's range of Intruders and British Phantoms (the latter aren't especially cheap mind)
Hope that helps, I've built many of the kits I've listed, so if you want any more pointers or pictures, just shout
Cheers
Shaun
maybe with practice.. 
