Heavens! You are contemplating buying a new meter that is twice the cost of the one you have and that you have not tried or tested, or a new Fluke T5, all because you need a new set leads for the existing Fluke T5. You would need to have blind faith in the Milwaukee and money to burn IMO to choose that option. Unless the existing T5 (apart from the leads) is damaged, why even consider buying a new one, the design and specification has changed only in minor ways over the years. I can only think of one reason for such a purchase, maybe you currently have a 600V version and can justify the need for the 1000V version. Otherwise be sensible and save money, just buy a new set of leads for your faithful friend.