First, printing marquees with today’s printers doesn’t get the same result as the old screened marquees.
What looks good on the monitor will also be totally different when printed and with backlighting.
So a fantastic windows wallpaper in HD would probably look awful as a marquee.
There is a good reason (not just limited printing methods back in the days) that the old classic marquees were very minimalistic with just a few (primary) colors and simple figures. They simply look better when backlighted.
Good looks is always in the eye of the beholder, but to give you some critics from my point of view my first reaction is that you do the same mistake as many “first mame’rs” – I.e. going “all in” with everything videogame related that you could ever think of.
Try to figure out and decide for a specific theme, rather than having it all that only gets blurry. The marquees are supposed to be catchy and attract people – not an encyclopedia of videogame history.
My suggestion would be that you copy any font of the classic gaming systems and use it to write you logo “Comer’s galaxy arcade” with some very basic colors that are easy to print and that would look good when lighted. And of course, have a theme that goes with the sidearts and cpo etc.
There are many good examples that you could have as a starter, but I think our friend in Denmark really did catch the essence in several of his builds:
http://www.koenigs.dk/mame/eng/