Re: RGA 121 vs. LTD MH1000 who has played both??
I have an MH-1000 and I'd say it has above average sustain, probably more than the Ibanez because it has a set-thru neck and it's also string-through. I don't really care for the bridge on it so I'm putting in a Wilkinson. When it comes to the paint jobs, Ibanez is more durable and thicker which is why I'll be refinishing mine because I can see a lot of imperfections in the paint job. This was my first experience with EMG's and I didn't really like them cause they didn't seem to have a tone of thier own like passives do, so I switched both of them out and just put an SD Invader in the bridge and filled in the neck pick-up hole. As for playability, 10/10 and the frets are awesome, jumbo height, but also thin so you have more room to play on the upper frets. I would choose the LTD because I bought it to make some modifications as I do with all my guitars. It's really up to you, both are great guitars, you should look at music shops in your area and play them both to see which you prefer. Keep in mind most people aren't as critical as me when it comes to paint jobs, but I have been a painter all my life so anything besides perfection in a paint job won't do for me. Sorry if I didn't help a whole lot, but you should know that you can't go wrong either way.