Certainly the cool factor is there. 99.99% of the guys wanting suspension work would never consider that much of add on pricing though. Maybe someday I can try one. In any case it is doubtful it's worth the green for us guys. In an "all out" vehicle weight reduction program they would be a "must have".
Renton Ti coils (via Speedwerxs) has been very active in the sled industry for a couple years now. Most worthy of the cash are the clutch springs though. You can ruin a stock clutch spring in less than a 1000 miles or even less sometimes. You lose rate there and you get a huge drop in performance. The Ti clutch springs are proving to be miracles in the clutching system.
I felt the same way about the weight issue. I need to drop the weight off me!!