if youre not looking to spend much the vittoria zaffiro in 700x32 is an ok tire for the price as long as you inflate them to 100psi, even at 85-90 psi theyll feel sluggish.

My favorite at the moment is the Panaracer Gravelking (its really a slick almost, with fine file pattern) in 700x28 for a training tire, but cost 3 times as much, i think a 28mm tire is pretty much as small as you should go for a rim that recently had a 41mm installed. The rims the Gravelkings are on , had 50mm tires mounted on them before.

Youd have to take a look at the predominant type of riding you plan on doing though. I found i dont ride on dirt much, so chose a more street oriented tire for my hybrid, at the same time i studied tire weights and like tires below 450 grams, the Gravelking weighs 280 grams and the tread pattern has less resistance than the Zaffiro, the Zaffiro weighs 420 grams for the wire bead version. While you can tell a difference between the two, its not a three times as expensive type of difference.

As i get stronger i plan on putting the zaffiros back on to prevent workouts from getting too easy with less benefit.

The schwalbe lugano is also a good candidate for a budget tire, but ive never tried it. Ive tried a schwalbe kojak slick in 32mm which was suppose to be fast, but it was a very slow tire, the Zaffiro was quicker....be careful of internet marketing hype. Especially on CRC.