If I may assist…I have had just about ever GK head.
In random order.
- I have the very first Legacy produced. It's still going strong, hundreds of performances. (800)
-The 500 is fine in moderate standard 4 or 5 piece environment. I have used that before plenty of times.
-Nothing sounds exactly like a 400 or 700 RB (the 800RB is its own thing).
- The Aguilar AG with the boosts on gets closer to the game, BUT it does not touch what a GK mids or grind does. Like not even close.
-If you need more then L800 or 700RB onstage then there is a problem of some kind. I'm not saying that sarcastically, but legitimately. Speak to a seasoned but not overly grumpy/biased FOH engineer, I will not even begin to speculate but I bet my house on it. There is a solution…(Again dead serious).
-I define the Legacy is that a MB and older RB had a child. (It's my personal favorite at this time).
-If you like the MBs there is a very good chance you will like the Legacy. (I can't see a reason why not). However I can easily see if someone preferring the Legacy over MB. (Both are great, but I'm biased)
- The 800RB has a cult following, it's my least favorite.
-GK has its own thing. In general…I don't think the modeling had nailed it. Feel free to disagree, that just my opinion.
If you like the sound of Gallien Krueger.
Then all I can say, get one and regret nothing.