I upgraded to S80 with AHRS, Nano3 and use an android tablet running TopHat - very similar to XCsoar and same formats...pretty happy so far, but I had no logger or flight computer previously. S80/S100 are really good instruments with great support from LXNAV. If interested in x-country flying, fly often, pick the brains of all the experienced pilots and beg or borrow a logger. Google maps is good for assessing the course, but be aware the imagery is dated!