I'll start. First one on our list that has and an A rating from me is Battle Bakraid
This to me takes the best things about the Raiden games and combines them with a nice game play sensibility.
Here are the categories I think we can all rate SHMUPS on.
Arsenal: This games scores in this category for quick power ups for shot, side, and option. The bomb leaves a bit to be desired, but if you are a purist you probably want to get by without using many anyways. Nice feature of auto fire devastating shot if you don't fire for a few seconds. Battle Bakraid doesn't let you down when you feel like blowing stuff up
Difficulty: It's a bit tough, but even my loser skillz can get through a level or two on one ship so it's manageable. It also has a stepped difficulty so the learning curve isn't too bad. Of course maybe some desire more of a challenge and see this as a bad thing. Perhaps we have more discussions about what is a good "difficulty"
Graphics: Graphics are very smooth, screen holds up to a ton of bullets better than some with this level of firepower. There is that Raiden realism effect, as apposed to a cartoon feel. Environments look very good, and offer a nice contrast. The screen can get busy but otherwise the graphics are appealing
Intangibles (sound etc.): Soundtrack is pretty good, name of the tune appears at the bottom left during levels as if you needed your attention drawn to it to appreciate it. Control is good, and makes to overall experience top notch.