Either sailplane is a good choice, but for what it's worth, I learned to fly on a Sig Riser. Easy to build, solid, responsive, not a bad looking sailplane. I like that Sig uses cap strips (1/16" balsa strips on the ribs between the leading edge and the top spar) which helps reduce sag between rib bays. I used a high start so can't tell you how it will run on a Norvel. I didn't build it with spoilers at the time, however I got another Riser (mostly for nostalgia purposes) and will be building it with spoilers. Either kit will do you well.