A stick would be a great way to go. The Hanger 9 Ultra Stick Lite is 74" wing and firewall to aft of rudder is 56.5" with a wing chord of 17" included ailerons and flaps for 1258 sq in. Your wing has less chord but is longer and has 1317 sq in so is in the ball park.
My USL weighs just over ten lbs and has unlimited vertical with a Zenoah G-20. (roughly equivalent power to the DLE 20). If you stay under 11 lbs, you would be in great shape and even have a good flier if over that a bit.