I was completely set on the Ti as well and have had it sit in my cart since the day it was announced. However, I first wanted to compare all models in person and waited until the watches became available on 20 September. Very glad I did, to me the visual difference between the SB aluminum and titanium wasn't big enough to justify almost twice the price.
Even the Apple employer who was handling the watches that day told me he would never spend that much on a watch that looks so similar to the aluminum model and will basically be outdated next year (not sure whether he had attended any of Apple's internal marketing trainings, I still very much appreciated his honesty, though!).
Anyway, in the end I went for the SB aluminum and added Apple Care for peace of mind (I dropped my S3 on tiles a few weeks ago and the screen shattered to pieces). I might go for a SS whenever Apple will release the next major upgrade of the watch (apart from the always on display, there wasn't any other substantial upgrade over last year's model, imo), but for now I'm pretty happy the SB Ti model didn't look nice enough to me to justify the steep price. After all the reports about scratches, I'm not even sure the casing will hold up much better than the aluminum, only time will tell (and while the sapphire screen is of course less prone to scratches, it doesn't bother me too much thanks to Apple Care).
I also tried the SBSS model but for me none of the watch bands with a price tag of <GBP 99 worked well with the shiny steel. The new sport loops looked ridiculously thin and cheap and the black leather loop looked way too light / greyish compared to the deep black of the case. But that's personal taste, of course, and I wasn't interested in any of the steel band options, for example.