I started out this last year with a JES extender I had from 2008 (never used it when I bought it) gained 3/4" with that, I switched to the epic extender and that has been great highly recommend. I do use both still just modified the JES to allow vacuum cup b/c that will fit under cloths and can stealth PE at home the epic will not allow for this FYI. Whatever you choose I would suggest not going with a noose type extender you can gain but eventually may run into nerve compression issues and this is not fun!
They're all pretty much the same. I personally would buy a cheap one. It's all going to feel the same and your unit will have no idea about how much you've spent.
In most respects, they are identical. Buy an inexpensive one if I were you. Your unit will be unaware of your expenditure, and it will all feel the same. flash games