Haven't got a chance to use my sit and stand yet (due in 2 weeks!) - I got the deluxe version here - which I chose because I can put the infant seat closest to me, and have my toddler in the front. A lot of double strollers only allow the infant seat to be locked in the front, with your toddler stuck behind, which seemed odd to me. Also, because DS will only be 22 months when this LO arrives, I wanted to option to have 2 full seats, vs. just the jump seat on the normal sit and stand - he still falls asleep sometimes when we are out and about, and I'd like him to be able to continue to nap.
If you want just the basic sit and stand, stalk craigslist, consignment stores and yard sales - I see them all the time. I was really fortunate and found mine on clearance at target 50% off (it was an online purchase, in-store return. since they can't stock it, they mark it down significantly) - so was less than $90.
I have used the double with two toddlers, and I don't mind the steering, honestly. it folds up compact enough to fit in the back of my 2006 Scion XB, which is saying something! and easy to fold and unfold.