I've been using the HeadBlade Sport for years now. I'm mostly happy with it, but I'm curious to know whether the similar-looking Eclipse is worth the upgrade (and expense). Being made of stainless steel, I imagine the Eclipse must be heavier than the Sport: does this work for or against you?
The S4 series is as heavy as a double edge safety razor. Don't forget that if you use the ambassador discount from SBG you save some money. I have the ATX S4, I think it's worth it, if you like the sport and you like double edge safety razors than you'll probably like the Eclipse. IMO the added heft removes the feeling like you need to bear down to get a closer shave.
Click on store at the top of the page then choose the headblade link then from there find the product(s) you want and the discount will be applied at check out.
As mentioned above, the added weight helps in that you don't have to apply any extra pressure.
If you have mastered the sport I see no reason for it the weight might make for a quicker learning curve for a beginner . Seems like a lot of money for very little if any gain to me .