I used to have Kenwood 718 back in the days but finding original ones is a dauting task.
Which speakers in your opinion are the best now available in the market
Not sure what you mean by best. Its a relative term considering these days, you can find everything within your budget, your aim, the kind of music you listen to and what you have planned in the future
Kenwood 718 were certainly an average pair with pioneer yellow cone ones the most superior speakers at the time (not sure the exact model no.)
With time, we have much higher end brands - like Focal, Alpine Type R, and my personal favorite JL Audio.
Your budget determines everything