Now that I'm not nak, I'll respond a bit better.
We started with a 29" limit snugride with front adjuster for ds and were happy with it, except he outgrew it much quicker than we'd hoped for and because we wanted the use of the carrier through the cold months and weren't quite ready to have him in a convertible, we bought a safeseat 1.
I honestly wish I'd just bought it from the beginning. It was new on the market when we were shopping for ds's seat, and I didn't want to spend an extra $60 when I knew he'd need a convertible to rf in anyways, so that's how we ended up with the snugride. Hind sight is 20/20. Could've saved myself some money & I think the Safe Seat would've fit him even better from birth. (He was a preemie & the snugride fit when we brought him home, but I much prefer the head support on the safe seat & think it would've been a better fit.)
I tried ds in a snugride at wal-mart last week and his head is at the top of the seat shell. He still has 2 to 3" left of torso growth room before outgrowing the SS1. (3 to 4" of shell above his head.) He's 7 mos old & VERY long torsoed.
eta: I'm in CAnada, so there is a bigger price discrepancy between seats to begin with.. also the snugride I could get on the sale, at the time the SS1 hadn't been on sale and TRU was the only place I'd seen carrying it. It's available cheaper and at more stores now. I ended up paying only $10 more for his SS1 than what I initially paid for his snugride, so if the dollar value is comparable, go with the safe seat all the way. The straps are nicer too, and it's really so easy to install. We use ours like a convertible now too unless he falls asleep in it.