Srwooten,
The 10.5i is an excellent arm from a functional and sonic standpoint. Sonically, I also enjoyed the 9 sig and with enough patience I think it can provide very comparable results. Whether it's cost effective for you is a personal decision. It was for me. Considering the importance of diligent set up and tweaking, anything that makes that easier and more appealing is cost effective to me. Another cheaper item that makes accurate setup easier is the Mint LP tractor. Try one of these for $99 and you may stop thinking about the 10.5i, at least for a while.
The 10.5i is an excellent arm from a functional and sonic standpoint. Sonically, I also enjoyed the 9 sig and with enough patience I think it can provide very comparable results. Whether it's cost effective for you is a personal decision. It was for me. Considering the importance of diligent set up and tweaking, anything that makes that easier and more appealing is cost effective to me. Another cheaper item that makes accurate setup easier is the Mint LP tractor. Try one of these for $99 and you may stop thinking about the 10.5i, at least for a while.