Any polymerase should be good enough to amplify 800 bases accurately. It depends a little on your primers. If the primers are poorly designed and prone to forming primer dimers then using hot start is a very good idea as primer dimer badly affects sequencing and hot start minimises the chance of primer dimer forming but if they are good primers any cold start enzyme will work well

Thanks Paul. Then I will go with hot start polymerase

Thanks Paul. Then I will go with hot start polymerase

Thanks Paul. Then I will go with hot start polymerase

Thanks Paul. Then I will go with hot start polymerase