In that case, the best things to spend your money on are good tires and more track time. I've ridden 3 different SVs on the track over the years and here's where I would spend my $$ if I were you.
At a beginner pace there are track-day only tires available, for the SV you might look at the Pilot Power 2CTs, Bridgestone BT-003s or Pirelli Supercorsa Pros. The 2cts are more street oriented, the 003s more track day oriented, and the Supercorsas track/race day oriented.
The best way to improve is to work on your fundamentals. Throttle control is first, steering a close second, brakes work comes a bit later, and then there is form. There is always something to work on but cover the basics first. Most of us want to buy our way to speed but it just doesn't work that way. When you think your form is starting to get good, have someone take some pics of you and you'll see how far you still have to go.
1) Suspension. A Penske shock in the rear and emulators/springs up front. I have a worked GSXR front end on my bike and I were to do it again, I wouldn't. I'm a big fan of the traxxino dynamics drop-in kit. Don't screw around with Ninja or GSXR shocks, they do not work well enough for track duty, regardless of what you may hear/read.
2) Rearsets and clipons. These will help make it easier to get in the proper form, which is much more important than HP, etc.
3) Stainless steel brake lines, good fluid, and track specific brake pads, I like Vesrah RJLs, there are other good brands out there.
3) More tires and more tracktime. Like any sport, you have to practice and practice correctly to get good. Go out every session with a specific skill, corner, etc you want to work on. Listen to the CRs, they are VERY good at what they do.
Don't mess with the motor, exhaust, or gearing. The stock gearing works at every track I've ridden and spending a $300-$1000 on a slipon/full exhaust/jetting doesn't make sense to gain 5-6 HP.
If you haven't picked up a bike, read the for sale sections on Wera.com, SVrider.com, here, the CCS forums, etc. There are a lot of great deals for around 3K, but there are also a lot of ratty, tired old SVs out there for about the same asking price. Most of the 2K and lower SVs for sale are going to cost you an arm and a let to get in to good condition, so it is better to spend the $$$ up front for one that has been taken care of.
Hope this helps,
Aaron