I would say go for it! Yes everyone knows that a well fitting saddle needsno pads at all but I do it for added comfort and to protect from future back problems. The flece is a really popular choice seeing as it provides slot of comfort but still looks really nice and streamline. Yes, in the summer thay will cause your horse to sweat a little more, but horses are horses and their gonna sweat anyways. Also, they don't cover as much as a square pad which I find leaves a huge square of sweat. In either situaton just give your pall a quick rinse after you ride. Now to get off topic, yes you need no pad for a wellfitting saddle I know, but not once have I seen a rider without padding. Even in the olympics, and those saddles fit their horses like gloves! Anyway hope this helped!
He knows when you're happy, he knows when you're comfortable, he knows when you're confident,
and he always knows when you have carrots.