Since you do not want to go over the 6 Lakh on road price ,I guess Ritz,Figo,Vista & Beat are things you would most likely look forward to cos of decent running costs.
1 Ritz is fast enough,silent engine(good sound deadening),good quality interiors(dash),has lot of small storage spaces,turbo has lag & then has a sudden rush,good service options available since its a Maruthi,also good mileage.
2 Figo is a hot seller,not very fast,good handling on highway,you sit very low in comparison to other cars on the list,interiors not that great(lock handle feels cheap),bonnet release is on passenger side(weird),steering sends vibrations at low speeds,has a surprisingly good sized boot,service I cannot comment on.
3 Vista is fast,visibility is a bit less thanks to a higher mounted dashboard,everyone in the car can see what speed you are doing cos speedo sits in the center(not a good thing is you have speed conscious passengers),you tend to drive this car faster thanks to good gearing ratios,you sit higher up than other cars on the list,service quality is questionable depending on dealer,service costs are the least here as long as you dont opt for cleaning jobs.
4 Beat is least spacious,can only seat 4,has an incredibly tiny boot which has no cladding(exposed metal),has a somewhat high mounted dashboard,interior quality is good,not very fast,suppose to be cheaper to run per km than an Enfeild,has ac compressor cut off when you accelerate,it is a 3 cylinder & it will get very noisy as you clock many km,rear doors do not have quarter panels(can get claustrophobic for rear passengers),has smooth power delivery,Chevy offers you an attractive maintenance package
I have driven all the above cars for a good amount of time(all of whom have clocked good kms) & observed them well,I hope I have helped you in reaching a decision