Can anyone recommend an ideal multiple server setup topology for vps offerings ??

Are you referring to cloud or just been able to manage all your VPSes from one location?

You should consider VPS mirroring solution in this case. As it is not a cheap hosting solution but if you want to offer ideal VPS set up, then you need to consider this solution as well.

You can create VPS on a main node, just like any other VPS, however, you need to create same VPS with same configuration on another node, which would act as a slave VPS. Hence, if one VPS node goes down due to any reason, then another VPS node can execute all the operation of that node without any fault.

Since you are not putting any load balancer or round robin DNS in your description, I feel you are actually placing two identical VPS on different nodes, and this will not work, talk about arp storms.

I believe, it's common sense thing If someone willing to set up VPS mirroring solution, he need to consider load balancing and round robin DNS so that the reason I thought there is no need to define it separately.

If someone read my post carefully, he/she can easily understand my recommendation. and if anybody don't understand, then it is not my fault