I'm no expert, but this seems to be very video game-inspired. It's fast-paced, extremely energetic and catchy, and straddles the line between shred and Japanese-styled power metal. Don't let the silly anime cover fool you. Like most stuff that Japan churns out, this album is serious business.
Awaken the Stone King
I'm not at all familiar with Keith Merrow, but this is a terrific album full of big riffs, excellent soft interludes, and a great knack for songwriting. I'd describe this mostly as somewhat groovy technical progressive metal, and I see that Jeff Loomis has a guest appearance. In some ways, I'd say this is comparable to Loomis's solo album as well.
This album is just awesome. Paul Wardingham is an Australian session guitarist, instructor, and producer that has seen fit to grace the metal world with an instrumental monster. Stylistically, this is fairly progressive, futuristic, and there are definite influences of melodic death metal at times as well. Quite heavy and intensely satisfying to listen to.
The Scarlet Citadel
I can find nothing about this album online other than it's available to download for a donation of your choice over at bandcamp. For what it's worth, I recommend it. This is mildly symphonic progressive metal that has some neo-classical, prog rock, and even power metal influences. A quality album, and I wish there was more info available about this.
If anyone else has any recommendations on quality instrumental recordings, recent or not, I'd love to hear about them. These are all quality albums that are at least somewhat obscure, and I want more of it!