either stay at stg 1 and save for 4wd or RWD car or go to stg 2+ and get a diff fitted etc. Depends how long you plan to keep the car whether makes any sense to go that far. I went straight to stg 2+ with a diff, so big outlay but the car is a beast now, but i would not recommend it unless keeping car for 5+ years as you may as well just enjoy stg 1 and stick £ 250.00 a month away towards something that can get the power down better.