Well, I designed my own SSC plane to match my particular style and tactics (the Rapier). I will occasionally sell basic kits for it, but I'm not a kit company, and the kits really aren't suitable for someone who doesn't already know a bit about how they like to build combat planes. I'm also random when it comes to shipping and some support.
However, there are some kits I think are great flying planes. The Avenger line designed by AJ Seaholm are very strong performers, and it's hard to beat AJ on support and helpfulness in getting them flying right. I think the url is
http://www.teamseaholm.com
The Battle Axe is a generally good plane. The fuse design is solid, but some recent testing here has shown that the Battle Axe's wing is only so-so in turning ability. So while it's a durable and common plane, it can leave you at a disadvantage to others at times. (Some guys here took Rapier wings and put them on Battle Axe fuses. The result was a plane that turned much much tighter than it did with the Axe wing. I don't know if it's an issue with the airfoil or wing area or what). On the plus side, the guys kitting it support the plane quite well, and sometimes sell ARF versions, which is a great thing. And they ARE really common at a lot of contests, espeically in the south, which means that you'll be likely to find someone to help with any issues that come up.
Hat Trick, run by Mike Fredricks at
http://www.hattrickrc.com/ produces some really solid planes as well. I honestly don't know what he is offering in SSC kits these days, but Mike's planes always fly well, and he's very helpful.