As to what you should buy now to churn out the guff required the Euro ATPLs, a person like Alex Whittingham would be the best to give advice.
I went to Bristol Groundschool, and those who showed up without a CRP-5 could not get the correct answers on the practice questions. After about three days, all those not using a CRP-5 ended up buying one.
Alex Whittingham has plenty CRP-5s on stock, plus they have two giant ones for classroom lectures.