Yeah... the nice thing about the HT world is that you upgrade when you can afford it and just spend the rest of your life suffering low-grade EP600 envy.

In the 4x4 world your vehicle and driving habits determine when you will upgrade, and if you don't upgrade you stop wheeling for a while ;(

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8