If you never go to Seremban or u are not from Seremban, it is kind of challenge for u to know more about Seremban project. For seremban property, i would suggest you take a look on the map 1st then only go on real site survey the access way and the area.
wikimapia.org is very useful web portal for you. Survey through the map on the access way and location. As i know, Seremban got few local reputable developer there such as Seri Pajam an North Elegence (personal know them).
Later on, u also can browse some of the developer website to look for their existing and coming up project.
Anyway, property is always about location and price. Hope this method can help u a bit.