I don't have an answer for this.
I will say that i think (as a franchise) you need to first recognize your weaknesses. The SUNS have gathered some bigmen over the years(much like one would gather firewood in the Sahara) but seem to have come up empty for the most part(as have quite a few teams). Amare was a success as a bigman IMO despite his defensive shortcomings.
The thing is,IMO the SUNS must remained focused on this truism of having to play with a legit bigman to succeed, and make things happen in trades,FA and the draft. Pump up the scouting for late rd picks and get aggressive in the draft if there's a guy they really believe in.
I liked Troy Murphy for us before the season began...i also thought that an old guy like Kurt Thomas would've helped counter our soft interior.
Many of you are touting J.Thompson, i think it's a viable option and a step in the right direction,but where will he get minutes in this offense?
If you cant draft a Jordan,Kobe or LeBron, you can't chase titles without a bigman and decide to simply rely on jump shooting and athleticism. Dead horse beaten.