Hi Keith,
I understand the 28-48 is a very good lens and I'm not averse to good zooms so would maybe consider two more ... the 35-70 and the 75-150. That would give me three lenses to cover most situation right? I spotted a 75-150 on eBay for $59.00 BIN which seems cheap and I was wondering if the other two sizes are in the same ball park price wise?
Don't be put off by people telling you that Zuiko zooms aren't as good as Zuiko primes. It's true, but the primes are quite superb and the zooms being second best to them is no mean achievement.
Of them all, I think the 28-48 is the best Zuiko zoom I have.
35-70? It depends on which one - the 35-70/3.6 is superb (and I'd challenge anyone here who says that only Zuiko primes are any good to tell the difference between results from this lens and from primes). I sold mine only because it was too big and heavy for my needs - I need light, traveling gear. Of the other two, it's f/4 vs f/3.5-4.5. I've had both and don't think there's a lot between them - they're not up to the f/3.6, but they're really pretty decent. The 3.5-4.5 is the one I've kept, purely because it is so much smaller and lighter - it's hardly bigger than a 50.
I also quite like the 75-150 (and $59 sounds like a decent price - if you don't like it you won't lose much by reselling it, and might even profit). I think the 100-200 is a bit better, but again the 75-150 scores on being lighter and more compact, and it really is a pretty decent performer - all of the Zuiko zooms I've used have given decent contrast (which is something that many zooms fall down on).
When I'm traveling with an SLR, my main kit is my OM2n with the 35-70/3.5-4.5 and the 75-150.
My bottom line suggestion is to try them - the way they've been holding their prices these last couple of years, if you don't like them you should easily be able to resell them.
