Advise on purchasing new bike

Hi, I’d really appreciate some advise on purchasing a new TT bike as I’ve been given some conflicting advise when it comes to wheels etc. I’m planning on Olympic and half Ironman distance Triathlons and the first questions would be the old tubs vs clinchers debate, I’m aware of the positives and negatives with both but I’m not sure which way I should go for what I need? the second question is with the bike I want I’ve been given a choice of wheels, the company have told me that 60/80 is the best all round set of wheels but they have offered me a disc at a discounted price. A time trialling friend of mine has said he always uses his disc in all conditions and given that most Tri’s aren’t that hilly having an 80 rear would just be a waste of money as I’ll never use it? please help

Thanks TAG79

You might have more luck with a little more info. If you know the positives and negatives of the tires, you should be able to answer that for yourself, right? Otherwise, what are your concerns? A lot of people like to run the disc at whatever opportunity they have, there are some races that you are not allowed to run a disc though.