My beloved sidi mtb shoes are so stretched out after 4 years of use that I have to wear 2 pair of socks to ride. I love the sidi fit and retension and I haven't found anything else that compares. I can't decide if I should get the dragon SRS or the dominator 4. I'm leary of spending an extra $70 for the srs soles and then having to spend another $50 every 9 months for new lugs, but I'm also worried about the life span and retension of having only vecro straps. My current sidis have the two strap buckles and the ultra buckle at the top, wich inspire more confidence and have been trouble free. Any thoughts? I want to order my new shoes this week.