Although tax is a contentious issue, I would not allow it to justify a decision either way. Both types of vehicles have excellent advantages, and some disadvantages. The final decision is yours, and yours alone and I feel that although asking for advice might seem useful, I suspect it is more likely to cloud the issue as you can get totally contradictory answers, all of which are correct.
If you have a specific vehicle in mind then by all means ask if anyone who has the same, to share their experiences with you. But look at what the primary function of the vehicle will be, and pick a model, that you like, from within that format. Don't forget that even models of the same make and type of vehicle can produce different results as a tow car. Maybe the 'Friday' car scenario is still with us.