Having lived with the original 1991 CD issue (CLACD 227) of this album for the past few years I've finally decided to 'upgrade'. And what a disappointment I found the remaster to be. Sure, the bonus tracks are great, but the sound....
Compared side by side with my earlier disc this one is MUCH louder. But because of the modern compression applied to achieve that boost in volume (and possibly some other digital tampering) it's less "natural" sounding than the original CD. I can't crank it up without it rapidly getting harsh on my ears. Yet I have no problem pumping the 1991 disc up loud, and loving it.
I'd say to anyone who wants to be able to enjoy their Motorhead at high volume, seek out the original Castle discs. If your ears are used to modern remasters those early CDs will probably at first sound a bit too quiet or tame (lacking the artifically induced "punch" common to many remasters), but crank them up loud and you'll soon see how they can be a more enjoyable and rewarding listening experience.
As for the music itself, I probably wouldn't recommend Bomber to a Motorhead beginner. It does contain some truly classic Motorhead moments (such as the title track and Stone Dead Forever), but taken as a whole it may seem a bit of a hit-and-miss collection of songs to the uninitiated.
My advice? Buy it after Ace Of Spades or Overkill, and before Iron Fist.