Please keep in mind while reading this that I am a Marlin supporter every chance I get, but...
Everybody keeps saying how much better Marlin's springs are than All Pro and Trailgear when it appears that they are all about the same. Gotrocks killed a set of Marlin "import" springs in a couple of weeks and either his front or rear Marlin "usa" springs in one trip to Moab plus a few weeks. I think the current springs are still doing ok, but even with the excellent warranty support I am not very impressed with the product.
I'm in favor of supporting Marlin if they are the springs you want, but I wouldn't expect them to be significantly different the AP or TG.
