I'm new to HK rifles and plan to eventually get both a MR556 and the SL-8. Can you guys give me your suggestions on which way you would go and why? I was looking at going w/ the MR556 first, but got to hold and drool on a SL-8 at a gun show today. Talk about a sweet firearm! Needless to say, I don't know which to jump on first, but either way I think they are pretty cool rifles! Thanks for your advice!