What are your goals for a shock change? That would help with the answer. Why do you feel the need to make the swap?
+1. We need more info. I changed my stock 12" SG shocks out for new 13" take offs from a RK. I didn't like the harsh ride with the 12" shocks. Now it's much less jarring to the spine over square edged bumps. I bought the 13" standard touring shocks off eBay for about $80. It's a much better ride and the increased travel is a very noticeable improvement.