The Easy Seat is a fundamentally flawed concept, precisely because of loss of control and stability ("little extra balance").
What types of saddles have you been using? I have a narrow padded Marin which causes me pain in the perinaeum after about 15 mi / 25 km , but I always find all three of my tensioned leather Brooks saddles extremely comfortable. If you react badly to any saddle, consider a recumbent bike. Also, experiment a bit with handlebar height, stem reach, seat height, and seat tilt.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069