Thats a good question Greg.
Like yourself ive had many a Speedy over the years and enjoyed all of them both vintage and modern, apart from the pre moon models all the classic moonwatches look pretty much the same.
Whilst looking for something a little different I decided to swap my standard speedy with a dial and handset from a 357040 (Japanese domestic market racing dial)
5ACF1172-B7FA-4425-AA5F-D3669F2A8C8E by Ben, on Flickr
I dont feel its a homage as its all genuine Omega parts, but it is what it is. A pimped up speedy.
A speedy 357040 would be very expensive and this comes in at about half the price.
Plenty on here have done the same, some with panda dials, reverse panda dials and personally think its a good mod to do and assuming you retain the original parts the watch can be returned to normal if and when you decide.
Genuine dial and hands for these mods are getting expensive now but should you not be happy with the result moving them on should not be to much of an issue.