At 155#, 5'11'' +/- and mondo 28 feet, I started on (and am currently riding) a speedcross 154. My setups relatively soft overall- sb124 & snowpro races. I run 48/45 degrees.
I find it to carve pretty well, my local hill is TINY.. I learned last year & plan to hit the mountains some this year, we'll see how much too turny it is for real speeds & I'll pick something up in the off season to fill that void, probably.
The price was the main factor for me- something like $220 new, the boots and bindings were also inexpensive for me. If you know you like carving, it'd be worth getting a better setup, but I've found this to be quite servicable for learning, and has justified some better equipment in time.