In the future, yes i'd definately consider going brushless with lipo, it will take the hassle away of frequent skimming and dishcharging.
For now, I would focus on getting really consistant lap times. If you can run for 5 minutes with your fastest and average lap time being between 0.5 or so of a second, you should find some benefits of running a brushless and lipo as they will give you a bit more punch.
I'd check out the Tekin range of equipment, yes I am sponsored but have been for about 3 years now, so I have every faith in them to perform well.
hope that helps