Recommended 1/10th indoor TC racing equipment

[muay30]

Ive been into 1/10th indoor touring car racing for a while now and think its time to buy some better equipment.
I have a basic set up e.g car tt-01 and everything except the brushless system, basic nimh charger/batts. Can anyone whos been doing this a while adivse or recommend what things i could do with upgrading thats not too expensive e.g good servos for racing, batts, charger etc Any input and advice on this woule be much appriciated.