The questions you're asking can only be answered by you. It boils down to how much money are you willing to spend, all at once or in increments.
An ARC VSi60, if you can find a nice one, will set you back at least $2600K-$3000K. Adding a Vandersteen 2Ce Sig will push the cost to around $5000K-$6000K range total. Does that fit your budget?