Head or Heart?
What type of character are you?
Arguably both can make you a better aviator - IMC will traing you to be a better instrument pilot and fly gently but accurately. Aeros will teach you to fly accurately in a spirited fashion.
If you are going to be using your PPL to get around in the UK then the IMC wins. If you are more inclined towards short trips but excitement aeros win.
The responses you will get here will be driven mostly by the character and style of the posters. Similarly advice from instructors will depend on their personal position. Those heading for an airline career and just through the training mill are more likely to tell you that the IMC is best.
Look and listen to the advice then think hard about what YOU want to do before deciding which training route to follow.