I actually really like R-type Complete's soundtrack.  It's not the sounds, or style I would've chosen in most songs, but, it's different then the hucard, which is nice, since I have both.  
I'm never going to compare Monster Lair to Gate of Thunder(I believe produced by Nick Wood), but I enjoy both for what they are.  Yeah, Monster Lair's synths are cheap, but, IMHO most Telenet games are much cheaper & cheesier sounding in the synth department.  With some exceptions, like Valis 1 & 2, the Exile's, the Cosmic Fantasy's.  I'm sure there are a few other's.  Even then, there are still songs I enjoy in Last Alert, Psychic Storm, Final Zone 2, etc.  Despite the fact that most of the sounds they use, really irritate me.  I feel like they should've known better.  Frankly, I'd love to redo alot of those soundtracks, & redistribute them.  But, there's not enough time in the world to do that. 
 
 As for Vasteel, it's an amazing soundtrack, but doesn't fit the game.  I haven't really played enough of the 2nd game to see if the music fits it.  Now that I think about it, I feel like alot of those Telenet games, had them using Casio's or Yamaha's(leaning more towards Casio's).  They just have really bad synths.  Not that I'm an expert, but, I just trust Roland.