You'll be fine with the Cap. It does not have to land any faster than any other high performance aerobatic plane. It's not going let you slow down and mush it in like the other planes on your list, but neither would the Sig Extra (or any other similar sized Extra/Cap/Edge/Sukhoi). Generally, the Edge designs seems to be the most forgiving for landing, slow speed, 3-d, and stall characteristics, due to the straight leading edge...

Generally you'll fly it in to the threshold with a couple of clicks of throttle in level or slightly nose down attitude, then get all the way out of the throttle and feed in elevator as it slows down and let it sink, then flair to a landing. Be sure you have a nice low idle to get it to slow down quickly after throttling down. If you get it too slow, too soon, you deifinatley risk a tip stall into the dirt. Again, that's not specific to the Sig Cap. Generally, the lighter the wing loading, better the low speed stall characteristics, and the Sig Cap is pretty lightly loaded.

Richard